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

How to make flash freeze liquid
Gather your materials.
This substitute is made by combining dry ice and ethanol. For our purposes we will use 99% isopropyl alcohol or rubbing alcohol.

Possible answers:
[A]. You will also need a plastic 2-liter bottle, a plastic 18 oz bottle, dry ice, and scissors. Dry ice pellets are easier to use than a block of dry ice.;
[B]. We also wish to check that none of the ingredients are unflavoured. Pour out all the water; the heat will trigger electricity.;
[C]. This substitute is suitable for children without cell phones. ( only 99% of the liquid requires a cell phone.;
[D]. For our culinary use, we will use 8 oz. ( 240 ml) of vodka and 45 ml (7 fl.;
The answer is:
[A].