【单选题】

What can mouth guard do for us

What can mouth guard do for us
A．It can prevent our faces from being hit.
B．It can reduce the effect of shock to our teeth.
C．It can stop us from grinding our teeth.
D．It can make up for the damage we make to our teeth.A．It can prevent our faces from being hit.
B．It can reduce the effect of shock to our teeth.
C．It can stop us from grinding our teeth.
D．It can make up for the damage we make to our teeth.