The function p(x)= 2x+1 determines how many pizzas need to be purchased for an after school meeting, where x is the number of students at the meeting. The club leader uses r(p(x)) to find the amount of money to bring for the pizza purchase. The function r(x)=4x-3. Solve for how much money to bring when there are 9 students in the meeting.
A. 19
B. 33
C. 73
D. 84