Throughout much of the twentieth century, common scientific sense seemed to dictate that animals could not make a choice based on rational or aesthetic criteria. Such choices were

(i) the mental capacity of humans. Scientists who
(ii) this animal-human cognitive division were often accused of anthropomorphism.

reserved for,transgressed

Explanation:

Throughout much of the twentieth century, common scientific sense seemed to dictate that animals could not make a choice based on rational or aesthetic criteria. Such choices were(i) reserved for the mental capacity of humans. Scientists who transgressed  this animal-human cognitive division were often accused of anthropomorphism.