Because of the availability of trucks and easy access to modern highways, the locate

Each of the following sentences has four underlined words or phrases marked A, B, C, and D. Choose the word or phrase which be changed in order for the sentence to be correct.

Because of the availability of trucks and easy access to modern highways, the locate (A) of farms has become relatively (B) unimportant with respect to (C) their distance from (D)markets.