Answer:
a. firms have different costs.
Explanation:
A market might have an upward-sloping long-run supply curve if
a. firms have different costs.
b. consumers exercise market power over producers.
c. all factors of production are essentially available in unlimited supply.
d. the entry of new firms into the market has no effect on the cost structure of firms in the market.
All of the above. Hope this helped
The nations selling the gasoline would be in trouble. They would earn less money and the possibility of a depression like the one the US had under Hoover and FDR would occur.
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