What should the cloud architect include in the design to support this up-time requirement?

An organization wants to deploy SaaS applications in their cloud. The SaaS applications will be using application HA to maintain up-time levels of 99.9%. If an instance of the application fails, a new instance will be deployed to replace it.

What should the cloud architect include in the design to support this up-time requirement?
A . Additional hot stand-by hosts
B . Sufficient host capacity and orchestration
C . HA and replication licenses for hypervisors
D . Quorum disks

Answer: B