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$\frac{3}{x^{2}-x-20}+\frac{1}{x^{2}+9 x+20}$$\newline$Which expression is equivalent to the sum for all x>5 ?$\newline$A. $\frac{4}{2 x^{2}+8 x}$$\newline$B. $\frac{4 x+10}{\left(x^{2}-25\right)(x+4)}$$\newline$C. $\frac{4 x+10}{(x-5)^{2}(x+4)}$$\newline$D. $\frac{4 x+8}{\left(x^{2}-16\right)(x+5)}$