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 its B
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 its B