Question Statement:
Over a four-year period, exports were 120, 140, 160, 180 and imports were 110, 130, 150, 190 (in million USD). The cumulative trade balance over the four years combined was:
Options:
- (A) +20 million USD
- (B) +30 million USD
- (C) +10 million USD
- (D) -10 million USD