阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。
The two girls and one boy are very popular in their countries(国家). Do you know them?
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Name
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Information
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Harper Beckham
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Fr om: England
Age: five
She can dance.
She can play the piano(钢琴).
She likes nice clothes(服装).
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Suri Cruise
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From: America
Age: ten
She likes nice clothes.
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Wang Yuanye
(English name: William)
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From: China
Age: ten
He can speak English.
He likes reading books.
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的前n项和为
，且
，则
（ ）