Which of the following statements are true?

A. Countries should only produce based on their absolute advantage

B. Countrys should only produce based on their comparative advantage

C. Countries should only produce if they are a high opportunity cost producer

D. Countries should only produce if they are a low opportunity cost producer

E. If I can cook dinner in 10 minutes and do the laundry in 20 minutes and you can cook dinner in 20 minutes and do the laundry in 40 minutes, then there are no gains from trade to be made in this situation.