Which of These Individuals Can Be Considered an Entrepreneur

Which of these individuals can be considered an entrepreneur?

A) Sam, an employee at a sporting goods store, is solely responsible for all the purchases and sales at the store.
B) Joe recycles old household articles to build phones, radios, and other things for his personal use.
C) Max makes his living by investing in small companies that have the potential to grow.
D) Shondra started a company that processes plastic bags into fabric used in automobiles.
E) Ryan invented a hair regrowth formula and sold it to a company that sells several other hair growth products.