This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to tie curtains
Select tiebacks which match the design of your curtain.
Tiebacks come in a nearly endless variety of styles. If your curtains are a solid color, you can choose tiebacks that are the same color or a complimentary shade.

OPTIONS: (A). In the event that your curtains are solid colors, you can choose one color or another. Ensure a single-color curtain is the right fabric for your project.; (B). If you have patterned curtains, try choosing tiebacks that have one or more colors that are present in the patterns. You can purchase tiebacks anywhere home furnishings are sold.; (C). Compare each tieback with your natural curtains so you can determine which one you like. The tiebacks always use shades of brown or black.; (D). You can also choose curtains in contrasting colors. Measure your curtain to get the length that you need.;
The answer is:
(B).