A common command for many Windoze applications is "Page Setup". What in AutoCAD does Page Setup achieve?

You can create any number of named page setups and easily restore them for any layout.

http://autocadinsider.autodesk.com/my_weblog/2005/12/save_your_page_.html

In my opinion all of the above is my choice, since you can create multiple page setups

(a) Sets the scale at which the drawing is printed.

 For example, you might create one named page setup called Final Plot that plots the layout to your HP DesignJet on an E-size sheet at a scale of1:1, and a second one called Test Plot that plots the extents to your LaserJet on a letter-size sheet, scaled to fit.

(b) Sets the output device, also the size and orientation of the output

(c) Sets limits and the working units

(d) Sets Up the paper size, margins and orientation

Sets up pares size , margins and orientation, also pen width, shading, the complete output of the drawing, but the specific paper space

D is the right answer for sure.

(d) Sets Up the paper size, margins and orientation

(D) Sets Up the paper size, margins and orientation

Page setup are a method of saving your standard plot settings so that you can use them over and over again

Same as others, my answer is option (D)