Choose from the following options the correct combination of the plays which made significant use of expressionistic techniques:

The correct option is: The Hairy Ape, The Emperor Jones, Rapid Transit, The Adding Machine.

To understand why this is the correct combination, we can analyze the theatrical styles of each of these plays:
1. The Hairy Ape (1922) by Eugene O'Neill: This play is a landmark of American Expressionism. It portrays the intense alienation of the protagonist, Yank, using symbolic and distorted scenic designs, mechanized group movements, and stylized dialogue to represent his inner psychological state.
2. The Emperor Jones (1920) by Eugene O'Neill: A major expressionist drama that externalizes the psychological collapse of the protagonist, Brutus Jones. It uses expressionistic devices such as subjective stage projections of his hallucinations, stylized lighting, and a persistent, accelerating tom-tom drumbeat that mirrors his racing pulse.
3. Rapid Transit (1927) by Lajos Egri: This play employs expressionistic techniques to depict the dizzying, hyper-accelerated pace and mechanical depersonalization of modern industrial life.
4. The Adding Machine (1923) by Elmer Rice: A hallmark of expressionist theatre focusing on Mr. Zero, a generic clerk replaced by an adding machine. It features distorted visual designs, mechanical dialogue, and expressionistic sound and visual effects to dramatize the monotony and isolation of the machine age.

Why the other options are incorrect:
- All My Sons by Arthur Miller is a realistic family drama, not expressionist.
- The Crucible by Arthur Miller is a historical drama written in a realist/allegorical style.
- Waiting for Lefty by Clifford Odets is an agitprop (agitation propaganda) play that belongs to the tradition of social realism.