Sentence Correction

Some scientists have been critical of the laboratory tests conducted by the Federal Drug Administration on the grounds that the amounts of suspected carcinogens fed to animals far exceeds those that humans could consume.

A. far exceeds those that humans 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



HERE, the amounts of suspected carcinogens SHOULD BE PLURAL ...RIGHT?


the amounts of suspected carcinogens fed to animals far exceeds





The list of animals that exhibits a preference of either using the right or the left hand (i.e. claw, paw, or foot) has been expanded to include the lower vertebrates.

a)
b) exhibits the preference to use either the right or the left hand (i.e. claw, paw, or foot) has been expanded and includes
c) exhibit a preference in either using the right or the left hand (i.e. claw, paw, or foot) has been expanded to include
d) exhibit a preference for using either the right or the left hand (i.e. claw, paw, or foot) has been expanded to include
e) exhibit the preference as to either using the right or the left hand (i.e. claw, paw, or foot) has been expanded and includes

The list of animals ---- IS SINGULAR....RIGHT?

SO WE NEED EXHIBITS...?

The list of animals that exhibit