Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

Like the import of coal in vast quantities by power companies, the slow rise in imports of iron ore could erode the competition of steel companies, and leave them at the mercy of wild swings in international prices and supply disruptions.

the slow rise in imports of iron ore could erode the competition of steel companies, and leave them at the mercy of wild swings in international prices and supply disruptions.

the slow rise in imports of iron ore could erode the competitiveness of steel companies, and leave them at the mercy of wild swings in international prices and supply disruptions.

the slow rise in imports of iron ore could erode the competition of steel companies, and leave them at the mercy of wildly swings in international prices and supply disruptions.

the slow rise in imports of iron ore could erode the competitiveness of steel companies, and leave them in the mercy of wild swings in international prices and supply disruptions.

the slow rise in imports of iron ore could erode the competition of steel companies, and left them at the mercy of wild swings in international prices and supply disruptions.