Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
-(Scenario: Linear Production Possibility Frontier) Use Scenario: Linear Production Possibility Frontier.If Largetown's labor resource decreases by 40 hours,the opportunity cost of producing shirts:

A) increases.
B) decreases.
C) does not change.
D) may or may not change depending upon the number of pairs of socks it wishes to produce.