Shawna charges $8 for each basket she makes. She can represent the total amount she makes selling baskets in a week using the expression 8b. Shawna wants to charge $4 more for each basket. 
Which expression would represent the amount Shawna would make for her baskets in a week at the higher price?
 A.b+12
 B.b+4
 C.4b
 D.12b