Find the derivative.

$y=7^{\sqrt[\phantom{2}]{x}}$

A$.\frac{dy}{dx}=ln7(7^{\sqrt[\phantom{2}]{x}})(\sqrt[\phantom{2}]{x})$

B$.\frac{dy}{dx}=2ln7(7^{\sqrt[\phantom{2}]{x}})(\sqrt[\phantom{2}]{x})$

C$.\frac{dy}{dx}=\frac{ln7(7^{\sqrt[\phantom{2}]{x}})}{\sqrt[\phantom{2}]{x}}$

D$.\frac{dy}{dx}=\frac{2ln7(7^x)}{\sqrt[\phantom{2}]{x}}$