What is a description of a dynamic storage service offering in the Cloud Service Catalog?

A.
Seagate 50 GB Storage Drive with 32MB Cache

B.
50 GB of local storage with a flat rate of $100.00

C.
2GB of SAN storage on an IBM Total Storage array connected redundantly with a variable rate
of $10.00 per MB used

D.
1GB storage with 99.9% availability, backup once per night, and automatic increase/decrease
of storage based on usage

Explanation: