You have three Amazon EC2 instances with Elastic IP addresses in

You have three Amazon EC2 instances with Elastic IP addresses in the US East (Virginia) region, and you want to distribute requests across all three IPs evenly for users for whom US East (Virginia) is the appropriate region. How many EC2 instances would be sufficient to distribute requests in other regions

A.3

B.9

C.2

D.1

正确答案是D