Question

form a compound sentence.
___________________________ diego should get an air mattress.
before his next camping trip,
for their next camping trip, hannah and
hannah should bring sleeping bags, or

Explanation:

To form a compound sentence, we need a clause that can be combined with "Diego should get an air mattress" using a conjunction (like "or" here). The option "Hannah should bring sleeping bags, or" provides a clause with "or" to connect to the given sentence, creating a compound sentence structure. The other options are either prepositional phrases or incomplete for compounding.

Answer:

Hannah should bring sleeping bags, or