What Is the Continuous Process Improvement Model

What is the continuous process improvement model?

A) A standardized set of activities that accomplish a specific task, such as processing a customer's order.
B) The result in a product or service that is received by an organization's external customer.
C) An invisible process to the external customer but essential to the effective management of a business.
D) The attempts to understand and measure the current process, and make performance improvements accordingly.