Question

Which sentence uses the comma correctly?

1. We walked to the pool and, went swimming

2. She should buy, eggs cheese and butter.

3. She went to the window, and there was her dog!

4. Today is January, 4, 1980​

Answer 1

3 is right. :) because none of the others should have the comma there.

Answer 2

The answer is 3.
Why?
Number 3 is a conjunction sentence using a comma before “and”. Conjunctions are used with a comma before using a FANBOYS.
F-for
A-and
N-nor
B-but
O-or
Y-yet
S-so