Question $2\mathrm{.}2\mathrm{.}0\mathrm{.}4\mathrm{.}50.$ Which of the following is incorrect?

A$.\underset{x}{lim}{x}^{2\mathrm{.}5}=.$

B$.\underset{x}{lim}{x}^{2\mathrm{.}5}=-.$

C$.\underset{x-}{lim}{x}^{2\mathrm{.}5}$ does not exist.

D$.\underset{x-}{lim}{x}^{2\mathrm{.}5}$ is undefined since the domain of the function $g(x)=x^{2\mathrm{.}5}$ is $[0,).$