Which of the following would shift the supply of Green Bay Packers football jerseys to the left? a. The Green Bay Packers make it to the Super Bowl. b. The price of the jerseys increases by $15. c. The technology of sewing machines use to make the jerseys improves. d. The cost of the fabric used to make the jerseys increases.

The situation that would shift the supply of Green Bay Packers football jerseys to the left is when the cost of the fabric used to make the jerseys increases.

A change in a supply is shown as a shift of the supply curve.

Factors that causes a shift in the supply curve include prices of factors of production, returns from alternative activities, technology, seller expectations, natural events, and the number of sellers.

In the scenario, the cost of the fabric used to make the jerseys increases and will cause suppliers to make less jerseys given that all other things remain constant because given the same amount of money they will only be able to buy fewer raw materials which will lead to making fewer jerseys