You have received an invitation to a business reception with an important client marked RSVP(Please Respond), you are tentatively scheduled to leave on a business trip that day. You should …（ ）

A、ignoretheRSVPbecauseyouprobablycan’tattend.
B、callimmediatelyandexplaintheproblem,askingifyoucanRSVPlaterwhenyourscheduleisfirm.
C、RSVP,soyouwillhaveitcovered,thendon’tgoifyourtripcomesthrough.
D、RSVP,thencalltocancelatthelastminuteifyourtripcomesthrough.