If a Newspaper Headline Indicates That U

If a newspaper headline indicates that U.S. net exports were -$190 billion in 2010, it likely meant that

A) U.S. exports were $190 billion and U.S. imports were zero
B) U.S. imports were $190 billion and U.S. exports were zero
C) U.S. exports exceeded U.S. imports by $190 billion
D) U.S. imports exceeded U.S. exports by $190 billion