Correct Answer: D
Explanation:
“Antonym” means opposite, and in the first sentence of paragraph two there is a context clue. The fire ants can’t be eradicated because of their number; therefore, prolific means their fertility and ability to breed.
Choice (A) and (C) are all synonyms for “prolific.”
Choices (B) and (E) are not relate to the word. “Laborious” means burdensome, and “lugubrious” means somber.