Answer:
These two might seem like straightforward antonyms, but there are a few differences to keep in mind. Overwhelm is a verb that means “to overpower” or “to cover or bury.” Underwhelm means “to fail to impress.”
Explanation:
Whelm is labeled as "archaic" in NOAD, as it has fallen out of use. Left in its wake are the would-be superlative overwhelm (which, rather than actually meaning "more than whelmed", has simply taken over its parent's definition) and its opposite underwhelm.
Political things like, the United States Congress or any time of Congress or any important government political things like that.
The answer is definitly going to be c, trust me on this one!
The original question should be "Which phrase from the sentence best reveals the meaning of the word impetuous?"
The correct answer will be careful and reasoned choosing.