A country's balance of payments records __.
选项：

A:the prices that a country pays for its imports and the prices thatthe country receives for its imports.
B:the flows of value between that country's residents and residents ofthe rest of the world during a period of time.
C:capital gains and losses on a country's international assets.
D:the value of a country's holdings of foreign assets, minus the valueof foreign holdings of the country's assets.