Who is right about the function of oxygen sensors?

Oxygen sensors play a critical role in optimizing the performance of an automobile's engine by measuring the amount of oxygen in the exhaust gases. This information is essential for the engine control unit, which adjusts the air-fuel mixture for efficient combustion. Proper functioning of the oxygen sensors helps in minimizing emissions, improving fuel efficiency, and ensuring that the engine operates within acceptable parameters.

If both Counterman A and Counterman B provide accurate information about the functions of oxygen sensors, highlighting their roles in emissions control and fuel management, then choosing the option that states both are correct is justified. Therefore, acknowledging that both countermen are right reinforces the understanding that oxygen sensors are integral to the operation of modern automotive engines. Each counterman may touch on different aspects of the oxygen sensor's function, contributing to a comprehensive understanding of how these sensors benefit engine performance and environmental compliance.