Final answer:
The sentence 'Jennifer wore a lace-trimmed dress to her cousin's birthday party' requires a hyphen between 'lace' and 'trimmed' to correctly form a compound adjective.
Step-by-step explanation:
In the sentence 'Jennifer wore a lace-trimmed dress to her cousin's birthday party,' the correct answer is B. A hyphen is needed between lace and trimmed. This is because 'lace-trimmed' functions as a compound adjective describing the dress. When two or more words are used together to modify a noun, they should be hyphenated to indicate that they work as a single concept.
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