Many "Megachiropteran" Bats Feed on Fruit, and Many "Microchiropteran" Bats

Many "megachiropteran" bats feed on fruit, and many "microchiropteran" bats feed on insects. If you capture a number of bats from each of these groups and feed them all fruit because you are unable to find insects to feed them, what is most likely to occur (provided the other aspects of their captivity are low in stress) ?

A) Both groups will do equally well if there are a wide variety of fruits available.
B) The microchirpteran group is likely to lag briefly because of a general lack of gut enzymes and transporters for fruit sugars but will adapt to fruits within days.
C) The microchirpteran group is likely to do very poorly because of a general lack of gut enzymes and transporters for fruit sugars.
D) The megachirpteran group is likely to do very poorly because of a general lack of gut enzymes and transporters for fruit sugars.