In order to reduce light-duty vehicle greenhouse gas emissions, a comp

In order to reduce light-duty vehicle greenhouse gas emissions, a company can use either low-carbon and renewal power or make land use changes; however, neither of these strategies are by themselves sufficient to achieve success, and must be used together to reduce emissions.

(A) can use either low-carbon and renewal power or make land use changes; however, neither of these strategies are by themselves
(B) can either use low-carbon and renewal power or make land use changes; however, neither of these strategies are by themselves
(C) can use either low-carbon and renewal power or land use changes have to be made; however, neither of these strategies is by themselves
(D) can either use low-carbon and renewal power or make land use changes; however, neither of these strategies is by itself
(E) can either use low-carbon and renewal power or it can make land use changes; however, neither of these strategies is by itself

Technique:
(1) If the underlined portion is on the longer side, the first place to look is the last underlined word (or maybe couple words). In this case, we have a 2/3 split between "themselves" and "itself." "Neither" implies "neither ONE," so we want references to "neither" to be singular. "Themselves" is plural; "itself" is singular. Eliminate A, B, and C.
(2) Between D and E, the only difference is the inclusion of "it can" in E. Do we want that? The word "either" sets up what needs to be parallel. Since the first item is the verb "use," we want the second item to also be a verb. "It can" isn't parallel with "use;" "make" is a verb, so that works. Eliminate E.

Answer choice D.

Official Explanation

Answer: D

(A) The correct phrase will be neither of these activities is by itself. Also use needs to come after either so that it can parallel make after or.

(B) The correct phrase will be neither of these activities is by itself.

(C) Land use changes have to be made is passive and breaks the parallelism. Themselves needs to be itself

(D) The correct answer.

(E) There is no need to repeat the pronoun it after or as this breaks the parallelism.