Answer:
According to research done on the NCBI database and on other governmental organizations that study teen behavior and the use of seatbelts, the best answer to your question would actually be: C: Type of vehicle.
Explanation:
According to data and studies on several websites, like the NCBI database and the CDC, it seems that not just in teenagers, but overall, in people of different genders, regardless of level of education, and even age, the use of seatbelts decreases depending on the types of vehicles. As such, it was evidenced through data on crashes in the United States as of 2000, to 2017 and beyond, that people who drove SUV´s, pick up trucks, and other such cars, did not perceive the need to use a seatbelt, even with regulations in effect. In teenagers, this tendency seems equal and tied right next to it comes the factor of drinking, which also affects the levels of daring in teenagers and increases the possibility that teenagers who drive big cars like trucks, or SUV´s, and thus feel less in danger and exposed, and who are also prone to drunk-driving, will not use their seatbelts while driving.