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A developer is troubleshooting a Lambda function in a VPC that fails to connect to a private subnet-hosted Amazon RDS SQL Server instance on port 1433. What steps should be taken to diagnose the connectivity issue?
A
Verify security group rules for both the Lambda function and the RDS instance to allow appropriate port 1433 access.
B
Ensure security group configurations permit necessary port 1433 traffic between the Lambda function and the RDS instance.
C
Check if the VPC is configured with a NAT gateway and if the RDS instance is set to allow public access.
D
Validate that the Lambda function's execution role includes permissions for RDS instance management.
E
Confirm the Lambda function's execution role has permissions for creating, describing, and deleting VPC network interfaces.
