A

$\displaystyle\lim_{x\to\infty}\dfrac{2x^2-x+4}{x^3-x-3}$

B

$\displaystyle\lim_{x\to0}\dfrac{\sqrt{1+x^2}}{1+x}$

C

$\displaystyle\lim_{x\to0}\dfrac1{1-e^{1/x}}$

D

$\displaystyle\lim_{x\to0}\dfrac{\ln(1+x^2)}{x^2}$