Which of the following statement is true ?

A. The life cycle of a product has many points of similarity with the human life cycle, the product is born, grown lustily, attains dynamic maturity, then enters its declining years

B. The current product mix is said to be optimal if no adjustment would enhance the company's chances of achieving the objectives

C. A brand is a name, term or design which is intended to identify the goods or services of one seller or group of sellers and to differentiate them those of competitors

D. All of the above

Answer: Option D