Sampling, testing, and inspection are quality management tools that may be used at three different stages in the acquisition process: before, during. and after a purchase commitment has been made to a supplier. Which of the following statements refers to the stage after a purchase commitment has been made to a supplier?

A$.$ It may be necessary to test samples to see it they are adequate for the intended purpose.

B$.$ Sampling or inspection is performed to ensure that the conversion process is in control and that defects are minimal.

C$.$ Inspection may be required to ensure that the items delivered conform to the original description.

D$.$ Comparison testing may be done to determine which product is better from several different sources.