For a first offense of driving a commercial vehicle under the influence of school or drugs you will lose your CDL for at least...

Answer: B — 1 year

For a first offense of driving a commercial vehicle under the influence of alcohol or drugs, the driver will lose their CDL for at least 1 year. This is a serious violation due to the safety risks involved in operating a commercial vehicle while impaired. It is essential for commercial drivers to maintain a high level of safety on the roads, and driving under the influence puts not only the driver at risk but also other road users. Losing the CDL for a minimum of 1 year serves as a severe consequence for this violation to deter drivers from repeating such actions in the future. Option A (6 months), option C (2 years), and option D (5 years) are incorrect as they do not align with the minimum suspension period mandated for a first offense of driving a commercial vehicle under the influence of alcohol or drugs.