Which statement describes the relationship between humans' ability to identify animals' grimaces and deciphering other facial
expressions?
A The author believes that humans' ability to recognize pain in
animals should lead to the ability to recognize other facial
expressions.
B The author discusses how animals ability to show pain through
facial expression proves that they are capable of a wide range of
expressions.
C That author discusses how humans are only interested in
identifying pained facial expressions in animals to improve the
ethical treatment of them.
OD The author explains how a grimace can be used as a base-line
emotion for animals, as all humans and animals have similar
expressions of pain.