When Studying Abroad Last Year, Thomas Found That His U

When studying abroad last year, Thomas found that his U.S. dollars didn't stretch as far as he had expected. Each time he exchanged his dollars for euros, he had to give up more dollars in exchange for fewer euros. The exchange rate indicates

A) the dollar has gained strength against the euro.
B) the euro is weak against the dollar.
C) the euro has gained strength against the dollar.
D) the demand for dollars is stronger than the demand for euros.