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

How to burn myrrh
Acquire a censer.
This is a container that you can use to burn incense. Censers come in wide variety of shapes, sizes and styles.

Choices:
(a). They can be made of metals, like brass or steel, or other non-flammable materials like ceramic. The material and style you choose is personal preference, and won't affect the censer's performance.
(b). One such object that holds the incense is called a candle. You'll need an appropriate container for the size of the incense you are trying to burn.
(c). They are usually made of ceramic and glass. If you are a light beginner, find one with a cross on the back or circular symbol printed on it.
(d). Whether you are in a mosque, a temple, a haunt or a place of worship, you should start small and build a collection of myrrh candles and incense in the evening to help you prepare for night time ceremonies and during gatherings. Once you have a collection of myrrh candles in your home, you can start forming your own label.
The answer is:
(a).