Carlos Owns a Propane Company That Services Residential Customers

Carlos owns a propane company that services residential customers.Recently, he started out a new customer by checking all appliances that used propane.This extra service is indicative of entrepreneurial marketing for which of the following reasons?

A) with fewer customers, it is possible to build good relationships with customers
B) a focus on customer retention is critical
C) a focus on personal interactions that will enhance word-of-mouth recommendations
D) a focus on making sure that the product or service is working properly