Answer:
The correct answer is C
Explanation:
Maxine got to know that the textbooks, are out of stock, which will disappoint the students, if they get to know, but she has to get the information regarding the orders.
So, she could start or begin his mail, by saying or mentioning that the students, we have to cancel or withdraw the order as the circumstances or situation arises, which is out of our control. I really appreciate the booking, but thank you for bookings.