Which of the following are most likely to have indifference curves that are L-shaped?

Two nations, Alpha and Beta, can both produce steel. Alpha has a comparative advantage in the production of steel if it:

A. Can produce more steel than Beta B. Uses more steel than Beta C. Has a higher domestic opportunity cost of producing steel than Beta D. Has a lower domestic opportunity cost of producing steel than Beta

A standard that identifies a pollution limit to be achieved without defining the technology to be used is called a(n)

a. ambient standard c. technology-based standard b. performance-based standard d. efficient standard