Allie noticed that to get her test grade, she could take Valerie's grade, multiply it by 2 and subtract 15. If Valerie's test grade was x, how would you write Allie's test grade?
A2x
B2x + 15
C2x - 15
D15x - 2
A2x
B2x + 15
C2x - 15
D15x - 2