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. exhibits a preference of either using the right or the left hand (i.e. claw, paw, or foot) has been expanded to include
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
If we use “either” before a verb, we need to use a verb after “or”.
Ex- I will either go out or spend time at home.
We cannot say I will go either out or spend time at home.
We use “either” after the verb if the verb is common to both objects.
Ex- I will go either to the mall or to the park.
(the verb “go” is common to both the objects- mall and park)
In the given question, we are talking about the “use” of either the right hand or the left.
Hence A, C, and E can be eliminated. It is not the list but the animals that exhibit a preference. Eliminate all options that use the singular verb “exhibits”.
Eliminate options A and B.Option D corrects all the errors stated above.
Hence, D is correct.