Final answer:
Referred customers tend to stay with an agency or brokerage longer than customers from other sources.
Step-by-step explanation:
The correct statement with respect to referrals from existing customers is: Referred customers tend to stay with an agency or brokerage longer than customers from other sources. This means that customers who are referred to an agency or brokerage by existing customers are more likely to remain loyal to that agency or brokerage for a longer period of time compared to customers who come from other sources. For example, if a customer refers a friend to their insurance agency and that friend becomes a customer, it is likely that both the referring customer and the new customer will continue to do business with the agency for an extended period.