If n and k are positive integers, is √n+k>2√n ? k > 3n n + k

If n and k are positive integers, is

\sqrt{n + k} > 2 \sqrt{n}

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are not sufficient.

答案：A

问题：老师你好，请问这道题思路是什么查看答疑