Net Exports for the United States

Net exports for the United States

A) were consistently negative for the three decades prior to 1981 but have since turned dramatically positive; as a result, the United States became a net debtor nation in 1985.
B) were consistently positive for the three decades prior to 1981 but have since turned slightly negative.
C) were consistently positive for the three decades prior to 1981 but have since turned dramatically negative; as a result, the United States became a net creditor in 1985.
D) were consistently positive for the three decades prior to 1981 but have since been fluctuating up and down around zero.
E) none of the above.