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What is the proper way to use RSVP out of the following?
What is the proper way to use RSVP out of the following options: A. RSVP regrets only, B. RSVP requested, or C. RSVP by a specific date?
The proper way to use RSVP would be option C. RSVP by a specific date. It ensures that the host gets an accurate headcount for the event and can plan accordingly.