Kimberly is observing the behavior patterns of a bird species in the wild. During her observational period, a forest fire sweeps through the environment in which the bird species lives. Which of the following is a testable hypothesis that can be made following the forest fire?

A.
Birds move to a new location when they no longer think that their current environment is beautiful.
B.
Bird species respond to all forest fires in the same, predictable fashion.
C.
The availability of a food source determines whether a bird species will continue to live in an area after a forest fire.
D.
After a forest fire, the main cause of bird extinction is sadness resulting from a loss of habitat.

C. The availability of a food source determines whether a bird species will continue to live in an area after a forest fire.