The most probable answer to this would be B. exporting more products that it imports.
Their exports would be petroleum and petroleum-related products. Their imports would be textiles, motor vehicles, chemicals, foodstuffs, machinery, and equipments. The economy of Saudi Arabia has been known to export petroleum and them related products. This is because since discovery, Saudi Arabia own at least 18% of the world's petroleum reserves which was also one of the many reasons that made Saudi Arabia be the nation that it is today.