Some Finches on the Galápagos Islands Feed on Insects,an Unusual

Multiple Choice

Some finches on the Galápagos Islands feed on insects,an unusual food for finches to eat.Which of the following statements about these finches is most likely to be true?

A) They could not survive if they were moved from their island.
B) They observed and learned this feeding style from local birds.
C) They switched their diet to insects because insects are nutritionally superior.
D) They gradually adapted to this feeding style because they had no competition from typical insect-eating birds.