susie an Diego are among the 36 student in Mr. Campell's algebra class. If Mr. Campell selects 6 students at random from the class, which of the following expressions gives the probability that susie and diego are both among those elected (Note: C(n,r) denotes the number of combinations of n objects taken r at a time.)

A. C(34,4)/C(36,6)

B. C(34,6)/C(36,6)

C. C(36,4)/C(36,6)

D. C(2,2)+ C(34,4)/C(36,6)