If the space animal theory is true, the creatures go down to the lower regions in order to ______.

A．He had lost his way in the dark.
B．His lorry had something wrong with it.
C．Nottingham was too far for him to drive that night.
D．He had suddenly felt ill.

A．he had seen him doing a strange thing
B．he thought he recognised him
C．the man had fallen and needed attention
D．the man had tried to escape