A) NO CHANGE B) their C) they're D) its

The SAT is a standardized test widely used for college admissions in the United States, and it includes a section dedicated to measuring your understanding and command of standard English conventions, including grammar. Its grammar portion covers a wide range of topics, from sentence structure and punctuation to the correct usage of words and phrases in context. Mastering SAT grammar requires a good handle on not only homophones but also on how punctuation affects the clarity and meaning of a sentence.

To excel in this area, practice questions often involve picking the correct word based on its meaning and grammatical usage in a sentence, much like the textbook exercise provided. Familiarity with rules surrounding subject-verb agreement, pronoun usage, and idiomatic expressions are also crucial. The SAT is designed to test your ability to edit and better the clarity of a passage, positioning you to be more successful in college writing and beyond.

Possessive pronouns are a fundamental part of English grammar that signify ownership or possession. Their use can often be confused with contractions, especially in written form where apostrophes are involved. It is vital to remember that possessive pronouns such as 'his', 'hers', 'its', 'theirs', 'yours', 'mine', and 'ours' never require apostrophes.

For example, in the phrase 'The cat licked its paws,' 'its' indicates that the paws belong to the cat. Contrast this with 'it's,' which is a contraction for 'it is' or 'it has'. Confusion arises because of the possessive pronoun 'its' being an exception to the rule that when something belongs to someone or something, it is followed by an apostrophe and 's' (e.g., 'the dog’s tail'). In school assessments and standardized tests like the SAT, discerning between possessive pronouns and their homophones is a critical skill.

Contractions in English are shortened forms of words or phrases, created by combining and omitting some letters, often replacing them with an apostrophe. They're widely used in casual speech and writing to convey a more conversational tone, which is why understanding them is so important for non-native speakers and for formal testing alike.

Common examples include 'don't' (do not), 'isn't' (is not), and 'they're' (they are). It's essential to know when and how to use contractions, especially in formal contexts where they might be less acceptable. In the SAT, using contractions correctly can help make your essay sound natural and fluent. However, misusing them, as often happens with their homophones, can lead to errors and misunderstandings in both the grammar section and in writing passage improvements.