CompArED with ADults, ChilDrEn ArE ______.
A．morE susCEptiBlE to ColDs AnD Flu
B．morE likEly to touCh thEir FACEs AnD nosEs
C．morE CArEFul ABout thEir AppEArAnCEs
D．wAshing thEir hAnDs morE FrEquEntly