A) NO CHANGE B) then C) than if D) than when

Conjunctions are words used to connect clauses or sentences, or to coordinate words in the same clause. They are essential for constructing clear and fluent sentences. Among the most commonly used are 'and,' 'but,' 'or,' 'so,' and 'yet.' However, when we are discussing comparisons, especially in SAT grammar practice, we often look at conjunctions such as 'than' or 'as.'

It's crucial to choose the appropriate conjunction to convey the precise meaning intended by the sentence. As in our example exercise, the choice between 'then' and 'than' can significantly change the meaning. 'Then' implies a sequence, as in 'first this, then that,' which is not suitable for comparisons. In contrast, 'than' is used explicitly for comparisons, necessary for the SAT writing and language section.

Comparative structures in English allow us to compare differences between two or more items. When constructing comparative sentences, there are certain grammatical patterns that we must follow. For example, we typically use the word 'than' to introduce the second part of the comparison. Comparative adjectives and adverbs are also used, usually with the suffix '-er' for short words (like 'taller') or with the word 'more' for longer words (like 'more beautiful').

In SAT grammar practice, understanding how to use comparative structures correctly is vital. Students should remember that the SAT often tests the ability to recognize when to use comparative words and phrases properly. Misusing them can create grammatically incorrect sentences or alter the intended meaning, as we have seen in our exercise example.

The SAT writing and language section assesses a student's ability to revise and edit the text for clarity, grammar, and effective language use. To excel in this section, one must have a strong grasp of English grammar rules, an understanding of sentence structure, and the ability to interpret text in context. This includes knowledge of punctuation, conjunctions, comparative structures, and various stylistic choices.

The example problem we've discussed involves choosing the correct conjunction to maintain grammatical integrity and convey the author's intended comparison. Regular practice with similar questions can help students become more familiar with the nuances of English grammar and improve their ability to spot and correct errors in a variety of contexts. Employing strategies such as eliminating obviously wrong answers and understanding the context of the sentence are key to tackling the SAT writing and language section.