The Supply Curve of U

Multiple Choice

The supply curve of U.S.dollars in the foreign exchange market is:

A) downward-sloping because it is negatively related to U.S.exports.
B) downward-sloping because it is negatively related to U.S.imports.
C) upward-sloping because it is positively related to U.S.exports.
D) upward-sloping because it is positively related to U.S.imports.
E) horizontal because it is unrelated to foreign demand for U.S.goods and services