Which elements are part of a broadway musical? a. sets and lights, b.singing and dancing, c.spoken dialogue, d.all of the above? this is for music

The answer is D. All of the above

I would have to say "D".
You need to have a good set and lighting to show off the set and actors/dancers.
You really need singing and dancing to make it a Broadway Musical!
Spoken dialogue goes far to further the show.