What is the relationship between the buyer's share of the expected profits and the buyer's share of the demand risk?

A. Under buy-back, risk increases with expected profits; under revenue-sharing, risk decreases with expected profits

B. Under buy-back, risk decreases with expected profits; under revenue-sharing, risk increases with expected profits

C. Under both contracts, risk increases with expected profits

D. Under both contracts, risk decreases with expected profit.