What can happen if you fail to check your mirrors and blind spots?

Failing to check your mirrors and blind spots can lead to missing critical information regarding other vehicles, pedestrians, or obstacles around you. This oversight increases the risk of collisions, particularly during maneuvers such as changing lanes or merging where awareness of surrounding traffic is essential for safety. Regularly checking these areas helps ensure that you are aware of your environment, allowing you to make informed and safe driving decisions.

The other choices do not address the significant safety implications of neglecting mirror and blind spot checks. Signaling alone is not sufficient when you're unaware of your surroundings, driving faster does not correlate with missing vital traffic information, and the vehicle’s course stability is irrelevant if there's a risk of an accident due to lack of awareness.