The correct options are
B Might hinder her pace of studies or career
C Might face issues regarding mental health
D Might lack the physical strength and health to bear a baby
The legal age for marraige in our country is 18 for girls and 21 for boys. This age bar is set is because teenage pregnancy is very difficult for girls and teenage boys are not capable of handling the reposibilities that come with marriage.
Girls face mental and physical challenges as her body and mind is not prepared for bearing and taking care of a child at that age. It might also hinder her pace of studies or hinder her career path.