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

How to replace a light switch
Purchase a new light switch that meets your requirements at a local home repair or hardware store.
Tell the store employee what kind of switch you want and how many you'll need, and they can help you determine the best purchase.
Single-pole switches are the simplest and most common.

Pick your answer from:
(A). A single-pole switch has just two positions-" on " and " off. " Disconnect the power to the light switch at your home's electrical service panel (also known as the breaker box or load center).
(B). They typically come with two unique handles, one for the warm side and one for the cold side. Some multi-pole switches may require a separate outlet, but these can be easily reinstalled in the process.
(C). Whole-pole switches are not recommended as they can make the switches fall out of place and vulnerable when the switch is replaced. Clip-in switches, which can be purchased or installed online, are more expensive and cannot be repaired easily.
(D). They can sometimes be purchased online, but there are many different brands available. Sterstons are simple, and you can buy and install them directly from an independent home repair shop.
The answer is:
(A).