GRE Vocabulary Builder

Answer: Choice (D) is correct.

Something that is conspicuous is noticeable, so look in the answer choices for the pair that are synonyms. Something that is ostentatious is flamboyant and showy, which is the exact opposite of unpretentious. A garrulous person is talking and outgoing, not reserved. Something that is sporadic happens in an irregular fashion, not as a consistent, recurring event. The only pair that contains antonyms is choice (D). Something that is temperate is pleasant, such as temperate weather.