You are presented with the quiz "Of the following items, the most likely to cause a car accidents is" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "being distracted while driving can cause people to crash their car" and "in many cases cellphones are not the only distractions behind the wheel". So, what's the best answer to the question?

Options:
1). cellphone.
2). spare tire.
3). fossil fuels.
4). smoking pipes.
5). toxins.
6). air freshener.
7). insurance card.
8). mechanical.
Answer:
1).