Class A has boys to girls in the ratio 2 : 3, and Class B has girls to boys in the ratio 5 : 3. If the number of students in Class A is at least twice as many as the number of students in Class B, what is the minimum percentage of boys possible, when both classes are considered together?

A. 30%
B. 33.33%
C. 37.5%
D. 39.17%
E. 40%