Which statement about certain types of cargo is true?

Unstable loads can require extra caution on curves because they have a higher potential to shift or tip during turns. When a vehicle turns, the distribution of weight changes, and unstable cargo, such as liquids or loose materials, can move within their containers, leading to a shift in the vehicle's center of gravity. This can adversely affect handling, stability, and control, making it crucial for drivers to take extra precautions, especially on curves where centrifugal forces are at play. Proper securing of the cargo, reducing speed on turns, and being aware of the vehicle's handling characteristics with that load are all important factors when dealing with unstable cargo.

In contrast, unstable loads do require careful handling, stable loads may have their own risks depending on how well they are secured and balanced, and cargo can significantly influence driving dynamics and safety. Thus, extra caution is warranted for transporting unstable cargo, particularly on curves.