So you're looking for 2 synonyms. B is the best answer, avert and prevent are synonyms of each other. The other choices are antonyms, or they're at least not synonyms.
First it could mean context clues and really context means info from the passage or quotes from the passage
<span>Concerning dictionaries and their proper use, the statement that is most accurate is B. a syllable is a unit of sound. D is incorrect because informal usage of a word is considered colloquial, and not formal. C is incorrect because meanings of words often change over time. A is incorrect because many foreign words exist in the English dictionaries, such as garage, or gesundheit, etc.</span>
Unlike memos, letters include formal and informative writing. Letters also are comparatively long and have a message conveyed to the recipient.
Hope this helps! :)
