Perform the Indicated Operation and Express in Lowest Terms $\frac{2 x+7}{x^{2}+4 x+3}-\frac{x+4}{x^{2}+4 x+3}$

Multiple Choice

Perform the indicated operation and express in lowest terms.
- $\frac{2 x+7}{x^{2}+4 x+3}-\frac{x+4}{x^{2}+4 x+3}$

A) $\frac{1}{x+1}$

B) $\frac{x+11}{x^{2}+4 x+3}$

C) $x+3$

D) $\frac{8}{x^{2}+4 x+3}$