Which of the following statements regarding the transport of a hazardous material is correct?

A) Federal law requires a truck to display a placard if it contains small amounts of several materials that become highly toxic when combined.
B) Even if the law does not require a truck to display a placard, the driver of the truck is required to carry documentation of the chemical being transported.
C) A tanker truck that displays a "Please drive carefully" placard is likely not carrying a hazardous material and should be considered safe to approach.
D) Any tanker truck or train that carries a hazardous material is required by federal law to display a warning placard, regardless of the quantity it is carrying.

Answer: B) Even if the law does not require a truck to display a placard, the driver of the truck is required to carry documentation of the chemical being transported.