The time guests should arrive for the 9 am opening is 8:30am.
When guests are expected at an event, best practice is to arrive 15 minutes before the opening time. If 30 minutes is subtracted from 9am it is 8:30 am.
If guests aim to arrive at exactly at 9am, it is likely that they would not be at the opening on time.
Here are the options to this question: A. 1 a.m. B. 9 a.m. C. 6 a.m. D. 8:30 a.m.
To learn more about how to calculate time, please check: https://brainly.com/question/26290873
