Which of the following would increase the current account of Country X? Country Y is Country X's sole trading partner.
选项：

A:Inflation increases in countries X and Y by comparable amounts.;
B:Country X's and Country Y's currencies depreciate by the same amount.;
C:Country X imposes tariffs on imports from Country Y, and Country Y retaliates by imposing an identical tax on X's exports.;
D:The central banks of Country X and Country Y reduce the money supply to increase interest rates.;
E:Country X imposes a quota on imports, and Country Y retaliates by imposing an identical quota on X's exports.