George spends all his pocket money on candies and potato chips every month. The last bag of candies George consumes yields $80 in marginal benefits, whereas the last bag of potato chips yields $30. George’s satisfaction is maximized under which of the following situations?

Explain your answer.

a. The price of candies is $12 per bag, and the price of potato chips is $3 per bag.

b. The price of candies is $10 per bag, and the price of potato chips is $5 per bag.

c. The price of candies is $16 per bag, and the price of potato chips is $6 per bag.