Before play-offs, a certain team had won 8
题型：单项选择题
问题：
Before play-offs, a certain team had won 80 percent of its games. After play-offs, what percent of all its games had the team won ？（）
(1)The team competed in 4 play-off games.
(2)The team won all of its play-off games.
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．