Which of the following differences between administering CPR to adults and children is most crucial?

A.
It is important to use slightly less force when administering CPR to children.
B.
It is important to use only one hand when administering chest compressions to children.
C.
It is important to avoid using mouth to mouth breathing when administering CPR to children.
D.
It is important to keep chest compression depth around an inch and a half when administering CPR to children.