单项选择题

给定日期DD,可以计算该日期当月最大天数的正确表达式是

A.Day(DD)
B.Day(DateSerial(Year(DD), Month(DD), day(DD)))
C.Day(DateSerial(Year(DD), Month(DD), 0))
D.Day(DateSerial(Year(DD), Month(DD)+1, 0))