I would say that the parallel list here is C) a lost puppy, a colored poster, and a happy boy.
This is because all words have an article <em>a, </em>and an adjective in front of them, so they are parallel.
I would not get involved with any of it, drama could start and it could end with negative results for you as well. it will catch up with jana eventually.
Answer:
Many songs were sang by her at the party.
"Friday is the best day of the week" is an opinion