—How did you find your visit to the museum, John?

—_____________.[ ]

A. By taking a No. 3 bus            

B. Oh, wonderful, indeed

C. A classmate of mine showed me the way

D. Very well

小华在练习自然数求和，从1开始，数着数着他发现自己重复数了一个数，在这种情况下他将所数的全部数求平均，结果为7.4，请问他重复数的那个数是( )。

A．2

B．6

C．8

D．10