For which of the following is a Class C CDL required?

A Class C Commercial Driver's License (CDL) is specifically required for operating a vehicle designed to transport 16 or more passengers, including the driver. This is a safety regulation that recognizes the unique responsibilities and risks associated with transporting multiple passengers, which can include everything from school buses to shuttle services. Drivers must have the proper training and knowledge to ensure the safety of all passengers in these scenarios.

The other options refer to vehicle classifications that need a different type of CDL. For instance, vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 lbs or more typically require a Class A or Class B CDL, depending on whether they are a combination vehicle or a single vehicle, respectively. A Class A CDL is meant for combination vehicles, while a Class B CDL caters to larger single vehicles such as trucks but with less than the threshold for Class A. Finally, any single vehicle under 26,001 lbs does not require a CDL at all, as it falls into the non-commercial driving category. Thus, option B is the correct choice that aligns with the specific licensing requirements for passenger transport.