单选题 If you own a car, you are probably considering buying some kind of car insurance (保险). However, when you are actually purchasing car insurance, it can be difficult for you to decide which is your best choice. The ideal buying process is to first research and decide, then purchase. Research first Before buying car insurance, you should find out the purpose of your purchase and how the insurance meets your needs. Decide on suitable Car Insurance Policies (保单)小题:According to the first paragraph, when buying car insurance, one should first _____