Hi! I’m going to leave my answers in the comments because it won’t let me post my answer.
Mcdonald's is the proper noun. Normally the proper noun is a name of something or someone, so Mcdonald's would be the proper noun.
If your not comfortable with a topic, you need to contact your teacher immediately. Tell them about your problems and they will excuse you or give you a different topic. Hope this helps :)
Sentence C because it is an comma sandwich (apposotive)
An apposotive sentence uses commas to separate an additional fact or idea.
Example: My dog, the white one,<span> is very mean. </span>
hope i helped!
