Which of the following statements is true?

The primary means for gathering information from customers and measuring customer satisfaction is a survey.

Directly involving employees in the quality management process is referred to as Six Sigma.

A relationship between a company and a supplier based on mutual quality standards is called sourcing.

A relationship between a firm and its supplier where the supplier agrees to meet the firms$$ quality standards, and the firm enters into a long$-$term purchasing agreement with the supplier is known as outsourcing.