Refer to the above diagram. A decrease in supply is depicted by a:

Refer to the above diagram. A decrease in supply is depicted by a:

Refer to the above diagram. A decrease in supply is depicted by a: 




A. move from point x to point y.
B. shift from S1 to S2.
C. shift from S2 to S1.
D. move from point y to point x.



Answer: C