If you stop at a railroad crossing with more than one track:

When stopping at a railroad crossing with more than one track, it is crucial to wait until you have a clear view of all tracks before proceeding. This ensures that you can see if any trains are approaching on any of the tracks. Multiple tracks can mean that while one train has passed, another could be coming on a different track that is not immediately visible. By waiting for a clear view, you maximize safety and reduce the risk of being caught by another train.

The other choices could lead to dangerous situations. Stopping on the first track while watching for another train does not account for the possibility that a train could come on an adjacent track, putting you in harm's way. Proceeding immediately after the first train passes overlooks the risk of following trains that might not be visible. Lastly, going through when one track appears free could be equally risky, as another train could be approaching on a different track without your awareness. Waiting for a clear view of all tracks ensures you are fully informed and can make a safe decision.