Multi-choice problem: Continue writing the next sentence in this paragraph:

How to change a background in adobe illustrator
Make a rectangle the size of your artboard.
The only way to permanently change the color of your background is to create a separate background layer. If you simply change the background color, the color will disappear when you print your artwork.

Select from the following.
a). File your artboard in microsoft illustrator. The easiest method to do this is with a file manager such as adobe.
b). Make a large rectangle to use as the background layer. You will be placing your art on a flat, hard surface.
c). Create a rectangle if your artboard is too large, such as 3 and a half square meters. Make your rectangle about 2 inches (5.08 cm) thick.
d). To create a background layer : Select the " rectangle tool " in the left tool bar. ( right column, fourth item from the top).
d).