Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

If companies earn economic profits in a perfectly competitive market, over the long run the supply curve will most likely:
Option A:shift to the left.
Option B:shift to the right.
Option C:remain unchanged.

Answer: B