In which one sentence is the comma correctly placed?After dinner, we watched a movie. She ran fast jumped high, and smiled. If you're, hungry please eat something

After dinner, we watched a movie.

She ran fast jumped high, and smiled.

If you're, hungry please eat something.

We went to the park, and played soccer.

The comma is correctly placed after the introductory phrase "After dinner".

It properly separates the introductory element from the main part of the sentence.