To Those Who Argue That Humans and Nonhumans Are Fundamentally

To those who argue that humans and nonhumans are fundamentally different kinds of beings, and thus are morally unequal, Singer replies that

A) this is empirically true in the case of the manufacture of tools but involves a bad inference.
B) this is empirically true in the case of language but involves a bad inference.
C) this is empirically false and based on a bad inference.
D) this is empirically false but based on a valid inference.