Bunuel
The rules of engagement under which a border patrol station can decide to use deadly force
includes responding to an invasionary incursion and the return of hostile fire.
(A) includes responding to an invasionary incursion and the return of
(B) includes responding to an invasionary incursion and returning
(C) include responding to an invasionary incursion and the return of
(D) include a response to an invasionary incursion and the return of
(E) include a response to an invasionary incursion and returning
OFFICIAL EXPLANATION
D
As you know, GMAT test writers like to put as many words between the subject and the verb of a sentence as they can, in hopes that you will forget to check for agreement. The subject of this sentence was the plural
rules. The verb: the singular
includes. This eliminates choices A and B. Choices C and E are not parallel (neither is choice A), because they mix verb-like forms with noun-like forms. The best answer is D.