A company is planning on hosting virtual machines across multiple Availability zones. Which of the following is the company trying to achieve with this implementation?

Answer options:

A.Better elasticity
B.Reduction in costs
C.Better Availability
D.Disaster Recovery

Answer : C 
Here , the company is trying to achieve better availability by hosting their infrastructure across multiple availability zones.
Option A is incorrect. Elasticity can be used as a concept used for the ability to quickly expand or decrease computer processing, memory, and storage resources to meet demand.
Option B is incorrect because there will be additional costs for more virtual machines and the bandwidth communication between the virtual machines.
Option D is incorrect because this is a concept used to recover against region wide failures.
For more information on regions and availability zones, please visit the below URL 

https://docs.microsoft.com/en-us/azure/availability-zones/az-overview