What is the expansion of $$\left(1 - \frac{1}{p}\right)^{2}$$?

A

$$ 1 + \frac{2}{p} - \frac{1}{p^{2}}$$

B

$$ 1 - \frac{2}{p} + \frac{1}{p^{2}}$$

C

$$ 1 - \frac{2}{p} - \frac{1}{p^{2}}$$

D

$$ 1 + \frac{2}{p} + \frac{1}{p^{2}}$$