Kelly offers to pay for 9 of her friends to play laser tag, but 2 of them don't want to play.

If laser tag costs $4 per person, how much will Kelly spend on her friends?

Choose the correct expression and solution to this problem.

A.
The expression is 4(9 + 2).
Kelly will spend $44.
B.
The expression is 9(4 – 2).
Kelly will spend $18.
C.
The expression is 4 ⋅ 9 – 2.
Kelly will spend $34.
D.
The expression is 4(9 – 2).
Kelly will spend $28.