If the integers a and b are chosen at random from 1 to 100, then the probability that a number of the form $$7^{a}+ 7^{a}$$ is divisible by 5, equal to:

A

$$\dfrac{1}{8}$$

B

$$\dfrac{1}{4}$$

C

$$\dfrac{1}{2}$$

D

$$\dfrac{1}{3}$$

E

$$\dfrac{1}{9}$$