Joseph is looking for a way to track how long it takes his team to perform final testing for each tractor. When a tractor gets approved to deliver for a customer, he would simply like a graph that displays a just single point for the time result for that final test. Over time, he would like to see how his team progresses. What type of quality control tool should Joseph use?

A. Scatter diagram
B. Run chart
C. Pareto diagram
D. Control chart

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