If the roots $$x_1$$ and $$x_2$$ are the roots of the quadratic equation $$x^2 -2x+c=0$$ also satisfy the equation $$7x_2 - 4x_1 = 47$$, then which of the following is true?

A

c = -15

B

$$x_1 = -5$$ and $$x_2=3$$

C

$$x_1 = 4.5$$ and $$x_2 = -2.5$$

D

None of these