What is the minimum age requirement to drive a CNG vehicle in Texas?

Answer: B — 18 years old

In Texas, the minimum age requirement to drive a compressed natural gas (CNG) vehicle aligns with the general regulations for operating commercial vehicles. Individuals must be at least 18 years old to hold a commercial driver's license (CDL), which is necessary for driving vehicles that meet certain weight specifications or transport hazardous materials, including CNG vehicles in many cases. This age requirement ensures that drivers possess the maturity and experience needed to handle larger, more complex vehicles safely on the road. Therefore, the correct answer reflects the legal standards in place for operating CNG vehicles in Texas.