18. Refer to the diagram. Line (1) reflects a situation where resource prices: a. decline as industry output expands. b. increase as industry output expands. c. remain constant as industry output expands. d. are unaffected by the level of output in the industry.

18. Refer to the diagram. Line (1) reflects a situation where resource prices:
a. decline as industry output expands.
b. increase as industry output expands.
c. remain constant as industry output expands.
d. are unaffected by the level of output in the industry.

find the cost of your paper