Which situation below correctly represents the algebraic expression 6x – 2?
A. Tom has 6 children he is taking to the zoo and 2 children decided not to go.
B. Tom bought 6 tickets to enter the zoo and he had a coupon for 2 dollars off the price.
C. Tom brought enough lunches for six children and he had two left over.
D. Tom bought 6 drinks and 2 bags of peanuts.