SAT English Practice Question

A group of researchers studied the effects of a new type of fertilizer on crop growth. They found that the fertilizer significantly increased the yield of corn, but it had no effect on the yield of wheat. This finding suggests that ______.

1. A.the fertilizer’s effects on corn were more significant than on wheat, and wheat plants may need a different kind of fertilizer.
2. B.the fertilizer’s effects on corn were more significant than on wheat, however wheat plants may need a different kind of fertilizer.
3. C.the fertilizer’s effects on corn were more significant than on wheat, for example wheat plants may need a different kind of fertilizer.
4. D.the fertilizer’s effects on corn were more significant than on wheat, but wheat plants may need a different kind of fertilizer.