Choose the correct sentence which has the same meaning as the given one.
My mother is very busy at work but she takes good care of her children.
A. In spite of being busy at work, my mother takes good care of her children.
B. My mother takes good care of her children but she is very busy at work.
C. Though my mother was very busy at work, my mother took good care of her children.
D. Although my mother was very busy at work, my mother took good care of her children.