The Widespread Use of the Internet by Customers Has Given

The widespread use of the Internet by customers has given hotels several advantages. Which of the following is are) considered to be the advantages) to the hotel?

A) The cost of online bookings is lower than through other distribution channels.
B) It provides the hotel the opportunity to monitor inventory in real time.
C) It generates loyal customers by making them eligible for bonus points.
D) All of the above
E) Only a and c