Yes, some words that usually nouns can function as adjectives. That is true.
I think it is e because A dependent clause is a group of words with a subject and a verb. It does not express a complete thought so it is not a sentence and can't stand alone.
The answer should be Theme is not the moral of a story.
The team is at the STORMING STAGE.
Team formation is made of four stages, which are: forming, storming, norming and performing. The storming stage is the second stage of team formation. At this stage, the team members open up and share ideas about how to make the team achieve its aims.
