Lever, pulley, and wedge Pulley, inclined plane, and screw Wedge, wheel and axle, and screw Wheel and axle, inclined plane, and lever
I gave my students this multiple choice question: Ana rolled her wagon down the ramp to reach the playground. There, she and her sister played on the seesaw. Which set of simple machines has Ana used?

Only one answer is correct among these 4 choices:
- Lever, pulley, and wedge
- Pulley, inclined plane, and screw
- Wedge, wheel and axle, and screw
- Wheel and axle, inclined plane, and lever

Could you tell me which one is correct?

Wheel and axle, inclined plane, and lever