In a freshman class of 80 students, 22 students take Consumer Education, 20 students take French, and 4 students take both.Which equation can be used to find the probability,P, that a randomly selected student from this class takes Consumer Education, French, or both?

A: P = 11/40 + 1/4 + 1/20

B: P = 11/40 + 1/4

C: P = 11/40 + 1/4 - 1/20

D: P = 11/40 + 1/4 - 1/10