Which statement is BEST supported by the data in the graph?

A
The percentage of birds with smaller beaks increased because there was less competition for food with the large-beaked birds.

B
The percentage of birds with larger beaks decreased because there was increased competition for food with the smaller-beaked birds.

C
The percentage of birds with larger beaks increased because they were better able to find food and survive to reach reproductive age.

D
The percentage of birds with smaller beaks increased because they were better able to find food and survive to reach reproductive age.