Which One of the Following Terms Best Describes Eurodollars

Which one of the following terms best describes Eurodollars?

A) Dollar-denominated deposits only in European banks.
B) Dollar-denominated deposits at branches of foreign banks in the U.S.
C) Dollar-denominated deposits at foreign banks and branches of American banks outside the U.S.
D) Dollar-denominated deposits at American banks in the U.S.