Which of the following statements is correct?

Your company decided to replicate the whole cloud environment in another region and use it as a cross-region failover in disaster recovery scenarios.

Your current environment includes Elastic Compute Service (ECS) instances, Server Load Balancer (SLB) instances and Relational Database Service (RDS) instances.

Which of the following statements is correct?
A . You can provision multiple ECS instances in multiple regions, thereby leveraging automatic high availability across regions
B . You can provision multiple SLB instances in multiple regions, thereby leveraging automatic high availability across regions
C . You can use DNS to resolve domain names to the IP addresses of multiple ECS instances running in different regions
D . You can use DNS to resolve domain names to the IP addresses of multiple SLB instances running in different regions

Answer: D

Explanation:

https://cloudacademy.com/course/alibaba-server-load-balancer-1066/alibabas-high-availability/