Sandi Barefoot Sells the Entire Output of Several Small Companies

Sandi Barefoot sells the entire output of several small companies based in Silicon Valley. Each of the companies designs and produces remote control devices. Sandi has almost complete control of pricing and selling-because the engineers who started the companies are mainly interested in inventing things. In addition, Sandi often provides working capital to the producers, who have very limited financial resources. Sandi is paid a substantial commission on all sales. Sandi is a:

A) broker.
B) selling agent.
C) field warehouser.
D) manufacturers' agent.
E) factor.