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

A. exhibits a preference of either using the right or left hand (i.e., claw, paw, or foot) has been expanded to include
B. exhibits the preference to use either the right or left hand (i.e., claw, paw, or foot) has been expanded and includes
C. exhibit a preference in either using the right or left hand (i.e., claw, paw, or foot) has been expanded to include
D. exhibit a preference for using either the right or left hand (i.e., claw, paw, or foot) has been expanded to include
E. exhibit the preference as to either using the right or left hand (i.e., claw, paw, or foot) has been expanded and includes

My answer: B

The list that exhibits BLANK the lower vertebrates. Limited my answer to A or B.
I chose B because of “exhibits” and “includes” are parallel. I also liked the location of “use either” hand.

A. exhibits a preference of either using the right or left hand (i.e., claw, paw, or foot) has been expanded to include
B. exhibits the preference to use either the right or left hand (i.e., claw, paw, or foot) has been expanded and includes
C. exhibit a preference in either using the right or left hand (i.e., claw, paw, or foot) has been expanded to include
D. exhibit a preference for using either the right or left hand (i.e., claw, paw, or foot) has been expanded to include
E. exhibit the preference as to either using the right or left hand (i.e., claw, paw, or foot) has been expanded and includes

The correct answer is E. Could you please explain why? Thank you! A