HELP Thousands of golden toads, shown below, used to occupy the tropical forests of Costa Rica.
In the late 1980s, however, unusually warm weather caused many of the pools that the toads used as breeding areas to dry up. By
2004, the golden toad was listed as extinct.
This example demonstrates how
A. extinction is directly related to human impact.
B. extinction is caused by bacteria, fungi, and other infectious agents.
C. extinction can be related to invasion by non-native species competing for resources.
D. extinction can be related to a failure to adapt to changes in the environment.