Sam is skilled at making both necklaces and earrings. Sam has no preference between making necklaces or earrings since he earns the same amount from the two activities. If the selling price of earrings decreases from $40 to $20, then Sam's opportunity cost of making necklaces and making necklaces is now profitable than making earrings. Suppose that the necklaces market consists of several suppliers like Sam who are skilled at making both necklaces and earrings. Which of the following is likely to happen to the supply curve of necklaces when the price of a earrings decreases? A. It does not change
B. It shifts to the left
C. It shifts to the right