Which of the following is the most efficient procedure to assist you in narrowing down a problem area? A. Compare the symptom as described by the customer to your knowledge of how most similar systems...

Which of the following is the most efficient procedure to assist you in narrowing down a problem area?

A. Compare the symptom as described by the customer to your knowledge of how most similar systems work.

B. Research the vehicle records in your shop from a similar vehicle that had a similar symptom.

C. Begin by replacing parts until the symptom appears to be no longer present.

D. Use the electrical schematic for the specific vehicle/system to help you understand the system; then compare the exact verified symptom to your understanding of system operation.