Which of the following function(s) can't be defined at \( x=0 \) to...

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Which of the following function(s) can't be defined at \( x=0 \) to make it continuous at \( x=0 \) ?
\( \mathrm{P} \)
(A) \( f(x)=\frac{1}{1+2^{\frac{1}{x}}} \)
(B) \( f(\mathrm{x})=\tan ^{-1} \frac{1}{\mathrm{x}} \)
(C) \( f(x)=\frac{e^{\frac{1}{x}}-1}{e^{\frac{1}{x}}+1} \)
(D) \( f(x)=\frac{1}{\ln |\mathrm{x}|} \)
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