When Thanksgiving Day is _____ the corner, stores and supermarkets are busy with people. [ ]

A. around

B. on

C. with

D. at

假定当前日期为2002年8月25日，星期日，则执行以下语句后，a、b、c和d的值分别是25、8、2002、 【13】 。
a=day(now)
b=month(now)
C=year(now)
d=weekday(now)