You rent a car for $29.85. the first 140 miles are free, but each mile thereafter costs $0.12. you plan to drive it 165 miles. what is the marginal cost of driving the car? a- the marginal cost is whatever can be purchased with $29.85 plus $16.56. b- the marginal cost is $29.85. c- the marginal cost is $3.00 plus the cost of gas. d- the marginal cost is the cost of gas plus the initial payment plus some additional payment.