Dr. Naismith first planned to bring outdoor games inside. But outdoor games were too physical and cumbersome to bring inside.

What is the best way to combine the information in the two sentences or clauses?
A.
Dr. Naismith first planned to bring outdoor games inside, but outdoor games were too physical and cumbersome to bring inside.
B.
Dr. Naismith first planned to bring outdoor games inside but outdoor games were too physical and cumbersome to bring inside.
C.
Dr. Naismith first planned to bring outdoor games inside but, outdoor games were too physical and cumbersome to bring inside.
D.
Dr. Naismith first planned to bring outdoor games inside; But outdoor games were too physical and cumbersome to bring inside.