I want to buy that kind of cloth because I _____the cloth ______well. [      ]

A. have told; washes

B. have been told; washes

C. was told; washed

D. have been told; is washed

设有栈S和队列Q，其初始状态为空，元素a1、a2、83、a4、85、86依次入栈，出栈的元素则进入队列Q，若6个元素出栈的顺序是g2、a4、83、86、s5、a1，则栈的容量至少是 ( )

A．6

B．4

C．3

D．2