The revenue of a company in the year 2002 is 20% higher than the year 2001, and the revenue in the year 2003 is 25% lower than in the year 2002. The cost in the year 2002 is 10% lower than in the year 2001, and the cost in the year 2003 is 15% higher than in the year 2002. What is order of the total profits x, y, z of the three years 2001, 2002, 2003 from smallest to the greatest?
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Az < x < y
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Bx < z < y
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Cz < y < x
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Dy < x < z
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Ex < y < z
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正确答案: A