How can weekend guest eat in the cafeteria？A．By paying for single meals on a walk-in basis

How can weekend guest eat in the cafeteria？

A．By paying for single meals on a walk-in basis.

B．By borrowing a student"s meal card.

C．By ordering most of their meals in advance.

D．By buying a weekend meal card.

请帮忙给出正确答案和分析，谢谢！