When Backing a Commercial Vehicle with a Trailer, the First

When backing a commercial vehicle with a trailer, the first steering action should be to:

A) Turn the top of the steering wheel in the opposite direction you want the trailer to go.
B) Turn the top of the steering wheel in the same direction you want to go.
C) Turn the bottom of the steering wheel in the opposite direction you want to go.
D) Turn the bottom of the steering wheel in the same direction you want the trailer to go.