(1) Each state should enact a law that makes wearing seat belts mandatory for all passengers and drivers in cars and trucks. (2) Statistics show that seat belts reduce serious crash-related injuries and deaths by fifty
percent. (3) As a result of laws like this in various states, seat belt usage in the United States has dramatically
increased in the past thirty years. (4) Some people believe that the government does not have the right to
force people to be safe, and that these laws are unfair. (5) The bottom line is that seat belts are proven to save
lives; therefore, everyone should be forced to wear one if they want to travel by car or truck.
Which sentence provides the reason for the author's claim?