When were the invitations sent out?

The correct answer, "As soon as the date was chosen," accurately reflects a time frame that indicates the moment the invitations were prepared and sent based on the decision regarding the event's scheduling. This implies a direct correlation between determining the date and taking the next step of notifying guests, which is a common practice in event planning.

This option clearly establishes that the invitations are sent promptly following the designation of a specific date, indicating efficiency in communication to ensure that potential attendees are informed immediately to mark their calendars.