Dr. Tichauer started his experiments initially to（）

A．The Indian Ocean comes before the Pacific and the Atlantic in size.
B．The Indian Ocean is surround by four countries.
C．Sri Lanka is the largest island in the Indian Ocean.
D．Strong winds from the Indian Ocean bring heavy rains to the countries in southeast Asi

A．Credit cards have more advantages than travellers’ cheques.
B．Dollar bills are as convenient as credit cards.
C．One-cent coins have been withdrawn from circulation.
D．You can increase your credit limit as you lik