Which of the following locations should be avoided for traffic stops?

The correct answer highlights the importance of ensuring the safety of both law enforcement officers and the people involved in the traffic stop. Choosing locations that are on hills and curves can be particularly dangerous because they may limit visibility for both the officer and other drivers. This reduced visibility increases the risk of accidents, as approaching vehicles may not see the stopped car or police vehicle in time to react appropriately.

In contrast, while the other locations mentioned—cul-de-sacs, shopping mall parking lots, and residential areas—might present challenges, they generally offer more visibility and space for officers to manage the stop safely. For instance, cul-de-sacs allow for easier navigation and less through traffic, shopping mall parking lots provide ample space for maneuvering, and residential areas are often more populated, which can deter reckless behavior. Therefore, hills and curves are particularly advised against in traffic stop situations due to their potential hazards.