Use reasoning to lead to the answer of the following question:
Everybody was changing into costumes in the dressing room, it was almost time to take the what stage?\nOptions:\n- theater\n- train\n- bathhouse\n- dwelling\n- actors and actresses

theater
Theatre requires changing into costumes.

Everybody was changing into costumes in the dressing room.

It was almost time to take theatre stage.

.

Therefore, the answer is theater