Multi-choice problem: Choose from the options at the end, and answer how do you do this: How to crack a walnut.

Pick your answer from: * Use a nutcracker and hold a walnut between two fingers. Open the nutcracker and place the walnut securely in the center of it. Hold the nutcracker over a bowl or a trash can to catch any debris. Squeeze the nutcracker shut in your hands until the walnut cracks.; * Use a nutcracker and hold a walnut between two fingers. Open the nutcracker and place the walnut securely in the center of it. Hold the nutcracker over a fire or stovetop to catch any debris. Squeeze the nutcracker shut in your hands until the walnut cracks.;
Use a nutcracker and hold a walnut between two fingers. Open the nutcracker and place the walnut securely in the center of it. Hold the nutcracker over a bowl or a trash can to catch any debris. Squeeze the nutcracker shut in your hands until the walnut cracks.