A

$\displaystyle\lim_{x\to x_0}f(x)^{g(x)}$

B

$\displaystyle\lim_{x\to x_0}g(x)^{f(x)}$

C

$\displaystyle\lim_{x\to x_0}\dfrac{f(x)}{g(x)}$

D

$\displaystyle\lim_{x\to x_0}f(x)g(x)$