单项选择题

Which of the following statements can be supported by the data in the graph
ⅠThe percent return on shareholders equity for all United States manu-facturers decreased from 1984 to 1988by less than 10 percentage points．
Ⅱ A return on shareholder’equity of more than 7 percent was achieved by each United States manufacturerin 1988．
Ⅲ The shareholders’equity for Manu-facturer X was greater in 1987 than in1988（）

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