If one root of the equation $$Ax^2 +Bx + C = 0$$ is two and a half times the others, then which of the following is TRUE?

A

$$7B^2 = 3 CA$$

B

$$7B^2 = 4 CA$$

C

$$7B^2 = 36 CA$$

D

$$10B^2 = 49 CA$$