Final answer:
Empathy for the customer is the most important attribute of customer-contact personnel.
Step-by-step explanation:
The most important attribute of customer-contact personnel is empathy for the customer. While education, sales related knowledge, and intelligence are all important qualities, empathy is crucial in providing excellent customer service. Empathy allows customer-contact personnel to understand and relate to the customer's needs, concerns, and emotions, which leads to better problem-solving and building positive relationships.