Product verification is usually performed in closing process. Which of the following statement are true?

A. Product verification is used to verify that work was completed correctly and satisfactorily B. Product verification provides management with information how effectively the seller is achieving the contractual objectives C. Product verification is a method for quantifying qualitative data to minimizes the effect of biases during select sellers D. Contract closure and manage stakeholders processes both perform product verification E. Product verification is includes samples of the suppliers previous products for the purpose of providing a way to evaluate a supplier's capabilitie