Economic profits at the short-run break-even point are

One reason supply curves have an upward slope is because

A) increased supply will require increased technology. B) to have more of the good supplied requires more firms to open. C) people will pay a higher price when less is supplied. D) a higher price brings a greater profit, so firms want to sell more of that good. E) None of the above answers is correct because supply curves have a downward slope.

A principal cause of the business cycle is the changes in total spending that occur in the overall economy

a. True b. False Indicate whether the statement is true or false