A change in ________ results in a movement along the short-run aggregate supply curve but does not shift the short-run aggregate supply curve

In the United States

a. only those who have made previous contributions to the program are entitled to receive the benefits of social insurance programs b. anyone with children is entitled to receive the benefits of social insurance programs c. anyone over 65 is eligible to receive the benefits of social insurance programs d. all taxpayers are eligible to receive the benefits of social insurance programs e. all poor families with children are eligible to receive the benefits of social insurance programs

Exhibit 6-10 Short-run cost schedule for book publisher's hourly production TotalOutput TotalVariable Cost TotalCost 0 cases of books $    0 $200 1   100   300 2   150   350 3   250   450 4   450   650 In Exhibit 6-10, the average variable cost of producing 2 cases of books is:

A. $50 per case. B. $75 per case. C. $100 per case. D. $150 per case.