Scientists Estimate That as Much as One-Fourth of All Species

Multiple Choice

Scientists estimate that as much as one-fourth of all species will become extinct in the near future, a rate of extinction not seen on Earth since the Cretaceous mass extinction. How are humans contributing to this mass extinction? (Check all that apply)

A) Contributing to climate change.
B) Intentionally killing all members of a species.
C) Destroying habitat.
D) Blocking evolution.