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

How to find the cheapest electricity company
Compare the rates.
Electricity prices are charged per kilowatt. You can find out how much you're currently paying, as well as how many hours of electricity you use each month, by looking at your bill.

Pick from:
[A]. Check to see if there are any additional charges. You'll also want to see if there are any additional charges or fees or surcharge on your bill.;
[B]. Note that particular rates are harder for such companies to charge. Start with the cheapest rates first to work your way up.;
[C]. Decide if you may be paying on a monthly basis, or a weekly or bi-monthly basis. If you're paying up close, like across the street, your bill may be significantly higher.;
[D]. A good rule of thumb is to multiply the number by 8 to find the company's rate. For example, if the company is charging $9.65 per kilowatt (50 , 000 = 45), two hours of electricity is your average electricity bill for that month.;
The answer is:
[A].