Which of the sentences below is punctuated correctly?
A. I opened the door and my cat ran outside.
B. I opened the door, and my cat ran outside.
C.I opened the door, my cat ran outside
I think it is A?
A. I opened the door and my cat ran outside.
B. I opened the door, and my cat ran outside.
C.I opened the door, my cat ran outside
I think it is A?