Wise buying is a positive way in which you can make your money go further. The 1 you go about purchasing an article or a service can actually 2 your money or can add to the cost.Take the simple example of a hairdryer. If you are buying a hairdryer, you might 3 that you are making the best buy if you choose one whose look you like and which is also the cheapest 4 price. But when you get it home you may find that it 5 twice as long as a more expensive model to dry your hair. The cost of the electricity plus the cost of your time could well make your hairdryer the most expensive one of all. So what principles should you adopt when you go out shopping? If you keep your home, your car or any valuable possession in excellent condition, you'll be saving money in the long run.
选项：

A:for
B:with
C:in
D:on