Most states have instituted mandatory seatbelt laws to reduce traffic fatalities. an economist may point out that an unintended effect of these laws is:

Increase in risky driving behaviour and increasing fatalities.

Explanation:

Various researches about seat belts have revealed that although the person wearing the seat belt feels more secure but they drive less carefully and lead to more traffic accident hence the seat belt decrease the fatalities among the drivers wearing them while the fatalities of other people go up. It offsets the effects of the seat belts.

Seat belts provide safety to ever one in the vehicle and keeps you in place during impacts. Those who do not wear seat belts while in a vehicle are at greater risk of severe injury or death.

the 4th option is the answer

answer; personal construct;