Increasing involvement in agriculture by large corporations has resulted in

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Increasing involvement in agriculture by large corporations has resulted in what is known as agribusiness-that is, agriculture with business techniques, including heavy capitalization, specialization of production, and to control all stages of the operation.

(A) By large corporations

(B) Has resulted in

(D) To control

Giải thích

Đáp án D => controlled

đây là 1 vế câu song song với has resulted in, là động từ chính trong câu.