单项选择题

下面程序段的运行结果是  voidmain( )  {    ihtt,a,b,C;    a=1;b=2;C=2;    while(a<b<c)    {t=a;a=b;b=t;c--;}    cout<<a<<","<<b<<","<<C;  }

A.1,2,0
B.2,1,0
C.1,2,1
D.2,1,1