Under the Motor Carrier Act of 1980, a vehicle hauling excess oil, explosives or nitrous gases is required to carry a minimum liability limit of:

The requirement for a vehicle hauling hazardous materials, such as excess oil, explosives, or nitrous gases, under the Motor Carrier Act of 1980, is indeed a minimum liability limit of $5,000,000. This high minimum is justified due to the potential for significant harm and extensive damage that these materials can cause in the event of an accident. The regulation aims to ensure that carriers operating such high-risk vehicles have sufficient financial resources to cover the damages and losses resulting from accidents involving hazardous materials. The specific mention of $5,000,000 reflects an understanding of the risks associated with transporting hazardous materials and the necessary steps to safeguard the public and property against those risks.

Other options suggest lower limits, which would not provide adequate coverage in the event of an accident involving these dangerous substances, making them unsuitable for compliance with the law.