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

How to hang a curtain swag 
Use single brackets if you're going to hang the swag by itself. 
If you're just going to have the swag over the window without any curtains, single curtain rod brackets are the way to go. Single brackets will hold up 1 curtain rod, which is all you need for the swag.

Possible answers:
1). If you're hanging your opaque curtain swag with different covers, use a single bracket for each sheet you want covered. The odd number of curtain brackets works well..
2). Double brackets are ideal for single curtain curtain. Measure 3 feet (0.91 m) off from the front of the window to be doubled for the curtain rod..
3). Buying additional brackets ensures that you have enough to hang the swag over 2 or 3 windows. However, if you want to add frills or there is a lot of room in your room, buy separately hung rod..
4). Get double brackets if you want to hang curtains up with the swag. Double curtain brackets come with 2 slots instead of 1 so they can hold 2 curtain rods..
The answer is:
4).