Which detail from the drama standing up by sitting in shows a description of sets and costumes to be used?

Question

Three black high school students, and there’s clothes
Frank: Hey there! I heard you’re going to have a sit-in. I want to join you!
They are gathering courage to begin a sit in at the store at lunch counter, which serves only white people.
David if they arrest us, more of our friends will come.

Answer 1

Three black high school students, and there’s clothes