The eastern pipistrelle bats leave their caves to hunt for food only on nights when the air is filled with insects. When insects are scarce, the bats remain in their roost. Of course, insects, being cold-blooded, prefer warm weather while cold weather makes them sluggish and unable to fly. So it might be theorized that the bats use air temperature as a guide to hunting conditions. But the bats roost a quarter-mile inside the cave, so temperature changes in the air outside the cave don’t register on them.
Which of the following, if true, best explains the seeming paradox described above?
(A) The eastern pipistrelle bats are not the only bats that exhibit the ability to know when hunting conditions will be good and when they will be bad.
(B) Insects are likely to be more active during warm weather conditions even though it is true that predators are also more active.
(C) Bats that do not roost in caves demonstrate the ability to distinguish even slight changes in the ambient air temperature.
(D) On those days on which hunting conditions are likely to be mediocre, some of the bats leave the cave to hunt but others do not.
(E) Even deep in the cave, the bats are able to detect the changes in barometric pressure that are associated with different weather conditions.
E:
E
it is E
E
D
E
I will go with optiion E
its E..!