A．They walked slowly and spent less time in it.B．They walked quickly and spent more time in it.C．They walked more quickly and spent less time in it than those in the white room.D．They walked as quickly as those in the white room.
A．They walked slowly and spent less time in it.
B．They walked quickly and spent more time in it.
C．They walked more quickly and spent less time in it than those in the white room.
D．They walked as quickly as those in the white room.