Write the next sentence in the following story.

How to make static electricity
Tie a piece of sugarless puffed cereal to the end of a thread.
You can actually test how well certain objects develop electrical charges (static) by making a homemade electroscope. To make a simple electroscope, tie a piece of puffed sugarless cereal to a thread and hang the thread off something such as a table or paper towel rack.

Select from the following. A). You can also weigh it down with wax paper or newspaper and place the assembly of the projector after weighing it down. Make a portable overhead projector by floating small magnets around the room. B). Have a friend or family member stand still while you draw the circumference of the device. Then, mark the desired conductivity on the material. C). It's okay if it isn't the best handheld method. You can find a bunch of supermarkets that run electricity primarily through electrotargeted pipes. D). Rub a comb or inflated balloon (not helium) with a piece of wool. Plastic combs and wool are two of the more common household objects that hold a great static charge.. The answer should be
D).