A Balance of Trade of -$160 Billion Means That

A balance of trade of -$160 billion means that:

A) U.S. assets abroad have fallen by $160 billion.
B) U.S. buyers purchased $160 billion more of foreign goods than foreign buyers purchased of U.S. goods.
C) foreign buyers purchased $160 billion more of U.S. goods than U.S. buyers purchased of foreign goods.
D) the U.S. government received $160 billion less in payment from foreign governments than it provided in foreign aid.