My mother is very busy at work. However, she takes good care of her children

A. Although my mother is very busy at work, but she takes good care of her   children.

B. In spite of busying at work, my mother takes good care of her  children.

C. My mother takes good care of her children but she is very busy at  work.

D. Despite being busy at work, my mother takes good care of her   children.