Add the rational expressions: $\frac{2}{x+3}+\frac{x}{x^2+6x+9}$

$\frac{3(x+2)}{{(x+3)}^2}$

$\frac{x+6}{{(x+3)}^2}$

$\frac{3(x+2)}{x+3}$

$\frac{x+6}{x+3}$