PINS QUESTION CHANGE BOX

Hello everyone. I have a mechanical test question and I don't see it clear. Let's see if you can help me with the answer:
-How are the pine nuts secondary axis of the gearbox?
A) Fixed overlaps c) Movables

Hello Jasperf1, it is a complicated question since there are many types of gearboxes that work in different ways, and the options to choose from either help, since it is a test question I imagine that they will refer to a basic gearbox of three axes, (synchronized and helical teeth)
,
Based on this I would not choose the option- C-, since the pine nuts do not move axially when the gears are engulfed, what moves is the synchronizer to fix the pinion to the axis.
Nor would I choose the
As far as only is left, I don't know what refers to "superimposed", but by discarding it is what I would choose.
You will tell us which one is correct.