Question

snow, dirt, or mud blocking your emission system may cause which of the following?

fatigue
temporary disability
carbon monoxide in the vehicle
decreased brake pressure

Explanation:

When the emission system is blocked by snow, dirt, or mud, it can lead to the buildup of carbon monoxide. Carbon monoxide is a harmful gas that can enter the vehicle's interior. Fatigue and temporary disability are not directly caused by a blocked emission system. Decreased brake pressure is related to the braking system, not the emission system.

Answer:

carbon monoxide in the vehicle