A frustrated and angry customer calls in with a system that does not work. Which of the following is the FIRST course of action for a technician to take?（）

• A、Transfer the customer to another technician, who can allocate more time to the issue.
• B、Maintain a positive attitude and offer them the cheapest solution possible to satisfy them.
• C、Listen to what the customer has to say and calmly recommend the best course of action.
• D、Use technical language to demonstrate knowledge and expertise to the customer.