Question

Jane and Louise bought popcorn before the movie started is a complex sentence or a compound sentence or a simple sentence​

Answer 1

Answer: it is a compound sentence

Explanation: before is a subordinating conjunction and since the sentence layout is main clause-conjunction- main clause so it is compound

Answer 2

A compound sentence

Jane and Louise bought popcorn makes sense on its own.
The movie started also makes sense on its own.
If it were a simple sentence it wouldn’t be able to be split and still make sense.