A. NO CHANGE B. Even when he sleeps, Grandpa says that to know his TV is doing what he wants is a source of both pleasure and power for him. C. Doing what he wants, even when he sleeps, is to know his TV is a source of both pleasure and power for him, Grandpa says. D. Grandpa says that to know his TV is doing what he wants, even when he sleeps, is a source of both pleasure and power for him.

Understanding and applying grammar rules is essential for effective communication and success on exams like the ACT English section. Rules of grammar govern everything from verb tenses to article usage, ensuring that language is used correctly to convey clear and precise meaning. When tackling ACT questions, one must be adept at recognizing proper sentence structure, subject-verb agreement, and appropriate punctuation.

For instance, a common grammatical pitfall is misplaced modifiers, which occurs when a descriptive phrase (modifier) is too far from the word it's intended to modify, leading to confusion or a change in meaning. Another frequent issue is pronoun-antecedent agreement, where the pronoun must agree in number (singular or plural) with the antecedent (the noun it refers to). Recognizing and correcting these common errors requires not only a knowledge of grammar rules but also careful reading of the sentence to ensure clarity and precision in communication. As these rules form the basis of many questions on standardized tests, a strong grasp of grammar can greatly enhance test performance.

Sentence clarity is crucial for effective communication. It involves constructing sentences in a way that the intention and meaning are easily understood by the reader. On the ACT English test, sentence clarity can be the deciding factor in choosing the correct answer. Clarity is achieved by adhering to a logical sentence structure, maintaining subject and verb proximity, and avoiding ambiguous or overly complex sentences.

To improve sentence clarity, one should focus on active voice instead of passive voice, be precise with word choice, and ensure that modifiers are placed correctly. Sentences should flow naturally, with ideas presented in a logical order. Avoiding unnecessary jargon or convoluted syntax also helps maintain clarity. When faced with options on the ACT, look for the choice that expresses the idea straightforwardly and without ambiguity. For the exercise provided, option D enhances clarity by keeping the subject (Grandpa) directly linked with what he expresses, avoiding the awkwardness found in the other choices.

Effective test preparation strategies are key to excelling on standardized tests like the ACT. Students are advised to familiarize themselves with the test's format, types of questions, and time constraints. Preparing well for the English section involves practicing grammar, punctuation, and sentence structure exercises. It is also beneficial to take practice tests to build familiarity and reduce anxiety.

Students should employ a strategic approach when answering questions: read passages thoroughly, understand the context, and apply critical thinking. It's important to eliminate obviously incorrect answers first to narrow down choices. Time management is vital—spend more time on questions that carry more weight and less on those that are simpler. Reviewing basic grammar rules and having a clear understanding of sentence clarity, as demonstrated in the original exercise, can dramatically improve the test outcome. With regular practice and a clear understanding of the English language's nuances, students can increase their confidence and potential for a higher ACT score.