单项选择题

Most banks in the U.S. open at 9:00 or 10:00 and close between 3:00 and 5:00, but stay open later on Fridays. Some banks have longer hours in order to attract customers.
What"s the best way to carry money safely while you are traveling There are three possibilities—personal checks from your country, travelers checks and credit cards. Some American banks accept foreign checks such as Eurocheques; the problem is that only those banks that are used to dealing with foreigners will know what Eurocheques are.
It may be more convenient to carry travelers checks, which are insured against loss. They should be in dollars, because only a few banks do much business in foreign currencies. If your checks aren"t in dollars, it may take you a long time to find a bank that will exchange them. You can use travelers checks almost anywhere—in restaurants, stores or ticket offices—without having to go to a bank. If you run out of them, you can buy more at most banks. Their service charge will vary, though, so ask what it is before you buy your checks.
Americans would say the best way to carry money is to have a major credit card like Vise, MasterCard or American Express. Credit cards can be canceled if they are lost or stolen. And because they are widely accepted in the U.S., it is easy to use them to pay for lodging, transportation, meals and things you want to buy from larger stores.
Of course, you can"t get along without cash, but you don"t need to carry much with you. Why should travelers" checks be in dollars in the U.S.

A.Because only a few banks deal with travelers checks
B.Because only a few banks deal with foreign checks
C.Because traveler checks are insured against loss
D.Because you can exchange the checks not in dollars easily