\(\mathop {\lim }\limits_{x \to  + \infty } \left(...

Câu hỏi: \(\mathop {\lim }\limits_{x \to  + \infty } \left( {\sqrt {x + 1}  - \sqrt {x - 3} } \right)\) bằng:

A \(0\).

B \(2\).

C \( - \infty \).

D \( + \infty \)