$$Zeoy$$閲讀$$15$$本書，一次閱讀$$1$$本．她花了$$1$$天讀完第一本書，又花了$$2$$天讀完第二本，再花了$$3$$天讀完第三本，其餘依此類推，即每讀完一本書要比讀完前一本書多花$$1$$天．$$Zoey$$讀完第一本書是在星期一，讀完第二本書是在星期三，若她每天都閲讀，則當她讀完第$$15$$本書時尼在星期幾？  Zoey read $$15$$ books, one at a time. The first book took her $$1$$ day to read, the second book took $$2$$ her days to read, the third book took $$3$$ her days to read, and so on, with each book taking her $$1$$ more day to read than the previous book. Zoey finished the first book on a Monday, and the second on a Wednesday. On what day of the week did she finish her $$15\text{th}$$ book?
选项为:A:星期日｜$ $Sunday  B:星期一｜Monday  C:星期三｜Wednesday  D:星期五｜Friday  E:星期六｜Saturday  请回答其中一个选项.