What can a dirty air filter do to a vehicle?

Answer: C — Allow impurities to damage the engine

A dirty air filter can allow impurities to enter the engine, which can cause significant damage over time. The air filter's primary role is to trap dust, dirt, and debris from the air entering the engine for combustion. If the filter is clogged or dirty, it becomes less effective, failing to filter out these undesirable particles. Consequently, dirt and other impurities can enter the engine and cause wear and damage to internal components, potentially leading to costly repairs and reduced engine performance. This can also affect the longevity and reliability of the vehicle. Maintaining a clean air filter is essential for optimal engine operation and protection.