What was the year when the rules regarding cargo securement were changed?

Answer: B — 2004

The year when the rules regarding cargo securement changed was 2004. This change was significant as it aimed to enhance safety measures concerning how cargo is loaded and secured in commercial vehicles. The revisions were part of an effort by the Federal Motor Carrier Safety Administration (FMCSA) to improve standards that keep the cargo stable and prevent it from shifting during transit, which can lead to accidents. In 2004, new regulations were implemented that provided clearer guidelines about the methods and materials that could be used for securement, the minimum number of tie-downs required, and specific requirements for various types of cargo. The increase in clarity and detail in these regulations was intended to reduce the risks associated with improperly secured loads, thereby improving overall road safety for truck drivers and other motorists.