If the Production Possibilities Frontier Were a Straight Line

Multiple Choice

If the production possibilities frontier were a straight line,

A) the Law of Increasing Cost would still apply.
B) the opportunity cost of producing one good would decrease as more of another good is produced.
C) the opportunity cost of producing one good would increase as more of another good is produced.
D) the opportunity cost of producing one good would remain the same as more of another good is produced.