About Lighting and reflection of the trailer: which statement is correct?

The white retroreflectors of a trailer belong at the rear.

Orange retroreflectors belong on EACH SIDE; at the front are white retroreflectors.

A trailer only needs a fog light if it was put into service after 31 December 1997.

The red triangular reflectors of a trailer belong at the front.

Explanation

Book p.232 - orange retroreflectors belong on EACH SIDE; at the front are white retroreflectors.