Mark the correct alternative in each of the following: \( \lim _{x \rightarrow 0} \frac{\sqrt{1+...

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Mark the correct alternative in each of the following: \( \lim _{x \rightarrow 0} \frac{\sqrt{1+x}-1}{x} \) is equal to
(A) \( \frac{1}{2} \)
(B) 2
(C) 0
(D) 1
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