At a College, 70 Percent of the Students Are Women

At a college, 70 percent of the students are women, and 50 percent of the students receive a grade of C. 25 percent of the students are neither female nor C students. Use this contingency table. If a student is male, what is the probability he is a C student?

A) 0.05
B) 0.10
C) 0.30
D) 0.17
E) 0.50