Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. How does the new plan benefit the students who cat all their meals at the school cafeteria
A．They can invite guests to meals at a reduced price. B．They receive cards that allow them to be served first. C．They can help decide what will be on the menu. D．They pay less per meal than those who cat there only part of the time.