SAT Vocab Builder

Answer: Choice (A) is correct.

Blatant means obvious, and furtive means secretive, so look for the answer choice that contains antonyms. One who is rapacious is predatory or greedy, so eliminate choice (B). One who is prurient and lascivious is overtly interested in sex, so eliminate choice (C). Obligatory and compulsory mean the same thing - required. All of the answer choices contain synonyms except choice (A). Spontaneous means on the spur-of-the-moment or unplanned, so choice (A) is correct.