Final answer:
A car mechanic uses science to make measurements of tire pressure with a tire gauge, ensuring tires are optimally inflated for safety and performance.
Step-by-step explanation:
A car mechanic would use science to make measurements of tire pressure using a tire gauge. This is a practical example of applying scientific principles to everyday tasks in automotive maintenance. Among the options provided, D) When using a tire gauge while finding the tire pressure is the most relevant to the context of making scientific measurements. Tire pressure gauges come in many models, but their purpose is to measure the internal pressure of the tire, which is essential for maintaining optimal tire inflation for load weight and driving conditions.