Which of the following statements about the marketing concept era is most accurate?

a. The marketing concept era can actually trace its roots to early Greek culture.

b. During the marketing concept era, companies tried to satisfy the needs of consumers while also achieving the organization's goals.

c. During the marketing concept era, companies tried to satisfy the wants of the consumer no matter what.

d. During the marketing concept era, companies believed if you produced as much as you could, at the highest quality level, for the lowest price, the product would sell itself.

e. All U.S. firms are now operating with a marketing concept era philosophy.