大全987-43

I picked D for this one because D sounds better.  Any reason why A is right?　　

感谢！！

1.       According to Booker T. Whatley’s recent analysis, planting the same crops as are planted on large farms will lead to economic disaster for the small farmer, who should plan a succession of high-value crops that will provide a year-round cash flow.

(A) planting the same crops as are planted on large farms will lead to economic disaster for the small farmer, who

(B) it will lead to economic disaster for the small farmer to plant the same crops as on the large farms; they

(C) economic disaster will result from planting the same crops as large farms to the small farmer, who

(D) economic disaster for the small farmer will result from planting the same crops as on the large farms; they（A）

(E) the small farmer planting the same crops as are planted on large farms will lead to economic disaster; they

哪位再给解释一下

谢谢