AWS Certified Solutions Architect - Associate
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A solutions architect is tasked with enabling access to an Amazon ElastiCache cluster from EC2 instances within a multi-tier web application, both located in separate VPCs in the us-east-1 Region. What is the MOST cost-effective solution to achieve this?
A
Establish a VPC peering connection and set up route tables and security group rules accordingly.
B
Utilize a Transit VPC for routing and configure route tables and security group rules.
C
Implement a VPC peering connection with specific security group rules for the peering connection.
D
Employ a Transit VPC for routing and apply security group rules to the Transit VPC.