社区通常指以一定（）为基础的社会群体。

A.地理区域

B.社会组织

C.户口划分

D.经济

An employee is paid 1.5 times the regular hourly rate for each hour worked in excess of 40 hours per week, excluding Sunday, and 2 times the regular hourly rate for each hour worked on Sunday. How much was the employee paid last week ？（）
(1)The employee’s regular hourly rate is $10.
(2)Last week the employee worked a total of 54 hours but did not work more than 8 hours on any day.

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．