Which sentence is an example of a simple sentence pattern?

1.After John heard the news, he left.
2.John left the room.
3.John left the room, and the room seemed empty.

sentence #2

Explanation:

A VERY SIMPLE explanation

A simple sentence is an independent clause that expresses a complete thought.

Sentence #1 is a complex sentence; it is made up of a dependent clause and an independent clause.

Sentence #3 is a compound sentence; it has two simple sentences (independent clauses) connected together.

I could elaborate with much more information, but that might be too much information for this simple - no pun intended - question.  

can you provide the possible answers

because people think they know everything well here is the truth they don't so yeah they try with what they have and they don't care if it's wrong or not some people do care but others don't hope this plz make me brainliest