Willa and Westley are siblings who built a hair salon business from the ground up. They are now contemplating opening an additional salon location. The estimate to open an additional salon would mean adding $1 milion in expenses with their profit increasing by $400,000 each year for the next 5 years (all other things equal), Willa and Westley decide

A. to open a second salon because the marginal cost of the new salon is low compared to other simlar projects

B. to not open a new salon because the marginal costs prove to be too high

C. to take on the new salon because the expected marginal benetit ($2 mlton over 5 years)