Which of the Following Is True of a Constant Cost

Multiple Choice

Which of the following is true of a constant cost production-possibility curve?

A) A constant cost production possibilities curve is drawn as a positively sloped straight line.
B) Along a constant cost production possibilities curve, the opportunity cost of producing more of a good is constant.
C) When a country engages in free trade, the constant cost production-possibility curve shifts to the right.
D) A country with a constant cost production-possibility curve partially specializes in the production of goods when it engages in free trade with other nations.