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Question 111·Hard·Transitions

Pollinator decline is often blamed on the intensive use of pesticides in large-scale monoculture farms. A growing body of research, however, suggests that small urban gardens can serve as critical refuges for bees and butterflies. ____ a recent study of 45 cities found that certain native bee species are now more abundant in metropolitan areas than in the surrounding countryside.

Which choice completes the text with the most logical transition?