The following sentence has been divided into parts. One of them may contain an error.
Select the part that contains the error from the given options. If you don't find any error, mark 'No error' as your answer.

The present-century threats to our environment, / which include interfering species, ailments, pollution and / a boiling temperature, were putting wildlife populations at peril.

A

which include interfering species, ailments, pollution, and

B

The present-century threats to our environment

C

a boiling temperature, were putting wildlife populations at peril

D

No error