Although extinction is a natural process, current extinctions are ...

[penza]

Although extinction is a natural process, current extinctions are of concern to environmentalists because
A) more animals than ever before are going extinct.
B) most current extinctions are caused by introduced species.
C) the rate of extinction is unusually high.
D) current extinction is primarily affecting plant diversity.
E) None of the options are correct

[plus1]

I recall doing this last year, it's C, bye bye!

[penza]

Incredible, thanks for your help!