Answer
Information must be retrieved from mass storage in a random manner.
Work Step by Step
The data in a reservation system that is constantly being updated must be stored on a magnetic disk instead of a CD or DVD
Information must be retrieved from mass storage in a random manner, which would be time consuming in the context of the spiral system used on CDs and DVDs. (Moreover, current technology does not allow individual portions of data to be updated on a CD or DVD.)
