A population of frogs is split between two ponds during a long-term drought. Pond A has several predators that can catch frogs. Pond Blacks predators and has plenty of food.
 Which adaptation is most likely to increase over time in pond A frog population?
 The ability to croak more loudly to attract mates
 
 B.
 The ability to swim faster
 
 C.
 A larger body size
 
 D.
 The preference for worms as a food source instead of insects