Which of the sentences below is punctuated correctly?

Question

(1 point
)I opened the door and my cat ran outside.
I opened the door, and my cat ran outside.
I opened the door, my cat ran outside.

i think its 2

Answer 1

yes it is correct, since it is 2 sentences joined with a conjunction, thus pinning the name of the sentence a "compound sentence".

Answer 2

thanks

Answer 3

np