In the Early 1990s,before Pay at the Pump Was an Option,a

In the early 1990s,before pay at the pump was an option,a gas station decides to force people to pre-pay due to drive-offs.The opportunity cost of this decision may include:

A) the value of the gas that is no longer stolen.
B) not having to look outside for people waving at you to turn on the pump.
C) the revenue lost because people will "low ball" how much they think their tank will hold in an effort to avoid having to come back into the store to get change from overpayment.
D) a loss of snack sales because people are coming into the store to pay for gas before pumping versus after pumping.