Answer:
C
Explanation:
Profit = revenue - costs, and we know the profit for B ($20) as well as the costs ($10). Since profit already accounts for cost, it does not make sense to include costs in our calculations as we want to maximize profit. As person A ($12) profits the company less than person B ($20), and person B working for 10 hours (20*10=200) makes the company $200 in profit without breaking any other rules, C is correct