Figure 45 Shows the Supply Curves of a Durable Good

Figure 4.5 shows the supply curves of a durable good. A shift from the supply curve S to S' could be caused by a(n) :

A) decrease in consumer income.
B) increase in the current price of the product.
C) patent application that restricts the use of a particular production technology.
D) several competing producers going out of business.
E) expectation of a higher product price in the future among suppliers.