There is a multitude of ways in which our leaders reach us personally.
For example,
Teachers are leaders that are more specialized in helping students, and there are some, such as counselors that are even more personally.
A more general way that we are reached is through laws. We choose our laws, and they in return enforce it. Such as building roads, or helping develop towns.
The answer is: b. Deterring criminal behavior
In order to deter criminal behavior, government need to prepare a certain level of precautions in order to discourage the act of criminal behavior in a certain area.
This could be done through several methods, such as create a proper management in the department of justice, impose harsh punishments from criminal behavior in order to make people scared of doing it, or improving the economy to eliminate the needs to steals/rob in the first place.