Shen is skilled at making both necklaces and earrings. Shen 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 $20 to $10, then Shen'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 Shen 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 shifts to the left
b. It shifts to the right
c. It does not change