There is a requirement to ensure optimal performance for the instances that are launched in two VPCs, having a peering connection. Which of the following steps should be taken to accomplish this requirement? (Select Two)

Answer options:

A.Ensure that the instances are launched in subnets in different AZ`s and create a placement group.
B.Ensure that the instances are launched in subnets in the same AZ and create a placement group.
C.Ensure that the instance type supports enhanced networking
D.Ensure that the MTU for the ENI is set to 1500 for the instances

Correct Answers - B and C
The AWS documentation mentions the following on placement groups/
A placement group is a logical grouping of instances within a single Availability Zone. Placement groups are recommended for applications that are benefited from low network latency, high network throughput or both. To provide the lowest latency, and the highest packet-per-second network performance for your placement group, choose an instance type that supports enhanced networking.
For more information on placement groups please refer to the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html