I was going to choose E, until I realized the keyword "increased" in the stimulus. Answer choice E says the trap became full allowing "some" beetles to escape. I put it in terms like this:

If there were 10 beetles in the garden to began with, and a trap caught 4 with one escaping, there are still 10 beetles in the garden total. The amount did not increase. But with D, one trap lured more beetles from another garden, increasing the total number of beetles in the garden in question. So, at first there's 10, one trap lured 4 more, there's now 14 beetles.

My issue with most LR questions is not reading close enough. "Increased", again, is the keyword here.

I chose C, and now see why its incorrect. Can someone go into detail why B is correct. I'm not grasping it. #help

I initially chose answer choice D, but during Blind Review switched to B. I decided against D using hypothetical reasoning. "Government Research frequently gives rise....". Perhaps we immediately think of medical research, but I put it in terms of animal, environmental, anatomy...just because the government funds it does not mean it could potentially benefit society as a whole. In this case, the funded research of powdered lead benefited society in the long run...but we cannot assume all funded research frequently does.