Which of the following indicators is generally not suspicious?

The choice indicating that a trailer having a different license plate than the truck is generally not considered suspicious could stem from several legitimate reasons, such as logistical operations or legal practices. For instance, it is not uncommon for transport companies to utilize interchangeable trailers that may be assigned different license plates depending on their operational needs or the regulations in different jurisdictions. Additionally, sometimes, trucks and trailers are rented or leased separately, which may lead to the mismatched plates appearing as a standard practice rather than a red flag.

In contrast, the other options list indicators that more clearly suggest potential issues. For example, if a company logo or insignia is not professionally applied, it could indicate that the company is not genuine, or that the vehicle may be involved in suspicious activities. Mismatched dimensions between the inside and outside of a trailer may reveal alterations that compromise security or indicate the trailer has been tampered with. A higher than normal floor in a trailer could hint at modifications meant to conceal cargo or illegal activities. Thus, the presence of different license plates often has straightforward and legitimate explanations, making it less suspicious in comparison to the other indicators provided.