3.2□△6
If □ and △ each represent single digits in the decimal above, what digit does □ represent ？（）
(1)When the decimal is rounded to the nearest tenth, 3.2 is the result.
(2)When the decimal is rounded to the nearest hundredth, 3.24 is the result.

A．条件(1)充分，但条件(2)不充分．

B．条件(2)充分，但条件(1)不充分．

C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．

D．条件(1)充分，条件(2)也充分．

E．条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．