Which of the following sentences demonstrates correct pronoun/antecedent agreement?
AElizabeth and Emily took theirs younger brother camping for the fist time.
BElizabeth and Emily took their younger brother camping for the first time.
CElizabeth and Emily took mine younger brother camping for the fist time.
DElizabeth and Emily took hers younger brother camping for the fist time.
AElizabeth and Emily took theirs younger brother camping for the fist time.
BElizabeth and Emily took their younger brother camping for the first time.
CElizabeth and Emily took mine younger brother camping for the fist time.
DElizabeth and Emily took hers younger brother camping for the fist time.