The Negative Slope of Korea's Linear Production Possibilities Curve Between

The negative slope of Korea's linear production possibilities curve between computers and rice means that

A) to get more computers, Korea must give up some production of rice.
B) Korea has a comparative advantage in rice.
C) Korea has a comparative advantage in computers.
D) Korea can produce more computers without having to give up some production of rice.
E) to get more computers, Korea must give up increasing amounts of production of rice.