The basketball coach, as well as his team, ________ interviewed shortly after the match for their

outstanding performance.                                               [ ]

A. were   

B. was

C. is   

D. are            

【说明】
现有事务T₁，T₂、L₃它们对数值型数据A执行的操作分别如下：
T₁；将A加1。
T₂：将A加倍。
T₃：输出A的值，并将A置为1。

【问题1】
假设T₁、T₂、T₃可以并发执行。若A的初值为0，那么存在多少种可能的正确结果