I am always busy but I manage to spend half an hour playing with my son everyday.

• A. Although I am always busy but I manage to spend half an hour playing with my son everyday.
• B. Although I am always busy I manage to spend half an hour playing with my son everyday
• C. However I am always busy I manage to spend half an hour playing with my son everyday
• D. I am always busy , therefore I manage to spend half an hour playing with my son everyday