Hazardous wastes generated by vehicle maintenance shops include

The correct answer encompasses all the listed types of hazardous wastes generated by vehicle maintenance shops.

Heavy metal paint wastes are produced from painting and bodywork activities, where paints containing elements such as lead, cadmium, or chromium can accumulate. These metals pose significant environmental and health risks, which is why they are categorized as hazardous waste.

Ignitable wastes refer to materials that can easily catch fire and combust. In vehicle maintenance settings, this could include oily rags, certain solvents, and cleaning agents. The ignition properties of these wastes make them a safety concern, necessitating careful management and disposal.

Spent solvents are another critical category of hazardous waste in vehicle maintenance. These solvents are often used for cleaning parts and equipment. Once they are used, they may be contaminated with various chemicals, making them hazardous due to their toxicity and potential to harm human health and the environment.

Combining all these components, vehicle maintenance shops are indeed significant contributors to various types of hazardous waste, hence making the comprehensive answer that includes all the specified options the correct choice.