Explanation
Choice C is the best answer. According to the text, Khramov's finding places the pollen-carrying insects much further back in the timeline than previously believed. The word "prehistoric" means before recorded history, and it correctly denotes how long ago these insects were pollinating plants.
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Choice A: "ferocious" means savagely fierce, or violent. The text does not mention anything about the nature of pollen-carrying insects.
Choice B: "elusive" means difficult to find. The text does not suggest that pollen-carrying insects were difficult to find.
Choice D: "contemporary" means belonging to the present. This would contradict the finding of Khramov's team that pollinators are much older than first believed.
✨ Expert's Tip ✨
Identify Khramov's claim that goes against some scientists’ belief about pollen-carrying insects.