Moving left to right the typical production possibilities curve ahas a constant neg. slope b has a constant posit. slope cillustrates increasing opportunity costs d ill. decreasing oppor. cost.?

Moving from left to right, the typical production possibilities curve:

C)illustrates increasing opportunity costs

Feedback: The typical curve is bowed out from the origin, reflecting increasing sacrifices of one good as the other is increased. This is the principle of increasing opportunity costs.