I'm confused. Regardless, doesn't (D) still require the assumption that insects avoid webs that reflect light, and thus, more visible webs? Common knowledge I feel allows that some flying insects are attracted to sources of light. These spiders might hunt at night bathed in the full moon for all we ...

After reading mattsherman's response, and after rereading the answer choice for probably the eleventh time, I understand where the issue with (A) pushes into the realm of a non-strengthen. (A) states: "A weaker correlation between taking melatonin and the inducement of sleep was found in the st...