Your financial services enterprise customer has a Microsoft Exchange implementation. Which
statement most accurately describes the importance of this system to them?

A.
It is not important. If it is down for a couple of days, it will not matter to the users of the
business.

B.
It is important. If it is down for a day, some users might be concerned, but the business will not
be impacted.

C.
It is mission-critical. If it is down for even an hour, most users and the business will be
impacted.

D.
It is core to their business, but typically it transacts only a small percentage of their revenue

Explanation: