The passage implies which of the following

A．The time of day when food is consumed affects its nutritive value.

B．Different foods can be combined to increase total nutrition value.

C．It can be detrimental to your health to eat breakfast foods later in the day.

D．When food is eaten has no bearing on its nutritive effects.

为预定的宾客开房后，将信息输入电脑时，才发现此房未退房，怎么办？