How does emphasis on agricultural technology today compare to the recent past?
A. In the past, scientists have not been concerned with the well-being of livestock or crops.
B. Today scientists are only concerned with the nutrition of livestock, not with size or quantity.
C. In the past, scientists were concerned with mass-producing for local areas, not for large areas.
D. Today scientists are devising ways to use advancements in positive ways for the environment.

