What type of vehicle is utilized for a Type A school bus construction?

A Type A school bus is constructed using a cutaway front-section vehicle, which is characterized by its unique chassis design that allows for easier access and greater visibility for the driver. This type of vehicle includes a front section that is accessible and separated from the bus body, which is then built onto the chassis. The design is specifically tailored for school transportation, providing safety features and accommodating a larger number of passengers while maintaining structural integrity.

In contrast, stripped chassis vehicles do not have the necessary structural supports or designs intended for bus modifications, converted vans typically do not meet the height and size requirements for a Type A school bus, and standard sedans lack the capacity and safety features needed for transporting school children. Thus, the cutaway front-section vehicle is the most suitable choice for constructing a Type A school bus, making it the correct answer.