D. First, students must fill out their health forms completely. Then, they must head to the gym for orientation.
Answer:
1. You shouldn't leave your ....
2. Someone must have stolen the paintings....
3. You didn't need to ask ....
4.Lousie may have drawn the dragon on the wall.
Based on the given sentence above, I can say that it is a compound sentence. What makes this sentence compound is that, it consists of two independent clauses and are connected by a coordinating conjunction "so". Therefore, the answer for this would be the last option: two independent clauses.
She decided to buy more wrappers.
