Choice B rationale:

The statement "The rash usually fades in the opposite order it appeared" indicates an understanding of the characteristic rash of measles. In measles, the rash typically follows a specific pattern, starting on the face and spreading downward to the extremities. As the rash resolves, it fades in the reverse order, disappearing first from the extremities and then from the face.

Choice A rationale:

This statement is incorrect. The rash of measles starts on the face and then spreads to the extremities.

Choice C rationale:

This statement is also incorrect. The rash of measles is not typically associated with intense itching. It is a maculopapular rash, which means it consists of flat red spots and raised bumps, but itching is not a prominent feature.

Choice D rationale:

This statement is incorrect. The rash of measles is not limited to the face and trunk; it affects the entire body.