If the remainders when the polynomial f(x) is divided by $$x - 1$$ and $$x + 1$$ are 3 and 4 respectively. then the remainder when f(x) is divided by $$x^2 - 1$$ is

A

$$7 - x$$

B

$$\frac{1}{2}(7 - x)$$

C

$$\frac{1}{2}(x - 7)$$

D

$$x - 7$$