Which of the following calendaring syntax expressions would evaluate to the last day of every month?()  
A、 FREQ = MONTHLY; BYMONTHDAY = 31
B、 FREQ = MONTHLY; BYMONTHDAY = -1
C、 FREQ = DAILY; BYDAY = -1
D、 FREQ = MONTHLY; BYDAY = 31
E、 FREQ = DAILY; BYMONTHDAY = LAST_DAY