问题详情

It can be inferred from the passage that a turnstile in a supermarket is ______ .
A．an automatic door that opens only one way
B．a revolving gate that lets out one person at a time
C．a revolving gate that admits one person at a time
D．a checkstand where customers can either pay with cash or pay by check请帮忙给出正确答案和分析，谢谢！