Final answer:
Signs of tire failure include uneven tread wear, bulges or blisters on the sidewall, and vibration while driving. Each sign indicates different potential issues with a tire that can lead to failure. The correct answer is that all the mentioned options are signs of tire failure.
Step-by-step explanation:
The signs of tire failure can be identified by several indicators. The options presented in the question are:
- Uneven tread wear
- Bulges or blisters on the sidewall
- Vibration while driving
All of these can be potential signs of tire failure. Uneven tread wear can indicate alignment or suspension issues and can lead to a tire's premature failure. Bulges or blisters on the tire's sidewall are a sign of a weak spot that could potentially lead to a blowout. Vibration while driving can be symptomatic of imbalanced tires, damaged tires, or misalignment, among other issues, all of which can ultimately cause tire failure.
Therefore, the correct answer is: 4) All of the above