Which sentence is punctuated correctly?
AThe teacher encouraged them "that they should do their best!"
BThe teacher encouraged them, Do your best!
CThe teacher encouraged them, "Do your best!"
DThe teacher "encouraged them that they should do their best!"
AThe teacher encouraged them "that they should do their best!"
BThe teacher encouraged them, Do your best!
CThe teacher encouraged them, "Do your best!"
DThe teacher "encouraged them that they should do their best!"