Do animals experience painful sensations in essentially the same way

Do animals experience painful sensations in essentially the same way as humans, or is an animal’s sensation of pain substantially different from a human’s, from either a physiological or a psychological point of view? To this question, one answer is as good as another because there is no way of establishing experimental criteria with which to evaluate the painful sensations that animals experience.

The author of the passage above assumes that

A) animals have a lot of similarities to humans
The author is not assuming animals and humans to be similar but instead he is questioning the same.

B) some day we may be able to determine the degree and type of pain experienced by animals
Not mentioned.

C) the experiences of humans and animals are fundamentally different
Restatement. That's a question the passage is asking.

D) experimentation can assess an animal’s experience of pain
The passage clearly states that there is no way of establishing experimental criteria.

E) animals do experience painful sensations
Correct Answer. The author assumes that animals experience painful sensations and then wonders whether these sensations are similar to or different than those experienced by humans.