单项选择题
某市举办足球邀请赛,共有9个球队报名参加,其中包含上届比赛的前3名球队。现将这9个球队通过抽签的方式平均分成3组进行单循环比赛,则上届比赛的前3名球队被分在同一组的概率是:
A. [img]https://img.shiyebian.net/gwyshijuan/504/143.png[/img]
B. [img]https://img.shiyebian.net/gwyshijuan/504/144.png[/img]
C. [img]https://img.shiyebian.net/gwyshijuan/504/145.png[/img]
D. [img]https://img.shiyebian.net/gwyshijuan/504/146.png[/img]