Palm beach south middle school's cafe produce 12 pizzas in one hour, and the cafe needs to produce at least 30 pizzas to feed the 6 grade students. in order to make sure all the pizzas are cooked in time for lunch, what is the least amount of time the cafe must allow for cooking the pizzas?

a. 2 hours
b. 2 1/2 hours
c. 3 hours
d. 3 1/4 hours