A company wants to use Amazon Elastic Compute Cloud (Amazon EC2) to deploy a global commercial application. The deployment solution should be built with the highest redundancy and fault tolerance.
Based on this situation the Amazon EC2 instances should be deployed:
A . in a single Availability Zone in one AWS Region
B . with multiple Elastic Network Interfaces belonging to different subnets
C . across multiple Availabtirty Zones m one AWS Region
D . across multiple Availability Zones tn two AWS Regions
Answer: D