Some scientists have been critical of the laboratary test conducted by the federal drug administration on the grounds that the amount of suspected carcinogens fed to animals far exceeds those that human could consume .

A)far exceeds those that human could consume

B)exceeds by far those humans can consume

C) far exceeds those humans are able to consume

D) exceed by far those able to be consumed by humans

E) far exceed those that humans could consume .

My doubt is both THAT and THOSE are pronoun so why both together in one sentence why OA E.

Pls suggest me...