A．The global crop production remained about the same.
B．Rice had the same yields as soybean around the world.
C．The wheat and corn production decreased everywhere.
D．Rice and soybean yields kept balanced around the world.

A．Corn production decreased by 4.5 percent．
B．Rice production increased by 5.5 percent．
C．The crop yield growth slowed down.
D．The crop production considerably decreased.

A．They might encourage the research of heat tolerance crop.
B．They should take measures to control the rising food price.
C．They should put more effort on growing rice and soybean.
D．They are supposed to give up growing corn and wheat.