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

How to make reed diffusers
Find a container with a narrow opening.
Begin assembling your reed diffuser by finding a suitable base container for the reeds. Look for a container that is about five to ten inches tall with a small opening made of ceramic, glass, stainless steel, earthenware or wood.

OPT: (i) Do not use a plastic container, as essential oils can react with plastic. A small opening at the top of the container ensures that minimal evaporation occurs.; (ii) You will place the reed diffuser at the bottom of the container. To make fine wicks, you will need to place a paste-like material around the opening to support your wick as you perform the project.; (iii) A container with a narrow opening will allow you to grab your reed diffuser with confidence and ease. You can be confident that the opening is wide enough to rest your reeds between your thumb and forefinger.; (iv) Ensure the bottom or rim of the container is small enough to hold the reed. Squeeze the reeds until you hear a popping sound.;
The answer is:
(i)