6.Getz Plumbing Supply is a family-owned business located in a town of 200,000 residents and serves professional plumbers and their customers. The company provides a wide variety of fixtures and materials as well as convenient operating hours. Plumbers often refer their customers to Getz and if a customer purchases their fixtures from Getz, the plumber typically receives a commission of 10 to 15% on the total sale. What type of sales channel is Getz Plumbing Supply utilizing?

a.Over-the-counter selling

b.Field selling

c.Telemarketing

d.Inside selling