During 1976 on the Galápagos Island of Daphne Major, Peter and Rosemary Grant found evidence of natural selection by adaptation when they observed that

A) finches with shallow beaks were less likely to survive and reproduce than finches with deep beaks.
B) finch beak size had no effect on survival rates.
C) many more small seeds were available for the finches to eat.
D) more finches with deep beaks died than finches with shallow beaks.