Using algebraic identities, simplify the following expression.
$$\frac{(x^4 + x^2 + 1)}{(x^2 + x + 1)}$$

A

$$(x^2 - 2x + 1)$$

B

$$(x^2 + x + 1)$$

C

$$(x^2 + 2x + 1)$$

D

$$(x^2 - x + 1)$$