If Country a Can Produce Computers More Efficiently Than Cars

If country A can produce computers more efficiently than cars relative to country B, then trade theory tells us that

A) the two countries should trade only if country B has an absolute advantage in car production.
B) country B will only gain from trade if it has an absolute advantage in car production.
C) country B must have an absolute advantage in car production.
D) both can gain from trade regardless of who has the absolute advantage in car production.
E) country A should not trade with country B.