A. Create a cross-Region VPC peering connection between the two VPCs. Add a route in the route table of VPC B to use the peering connection to access the S3 gateway VPC endpoint.
B. Create a gateway VPC endpoint in VPC B in us-east-1. Add a route in the route table of VPC B to use the S3 gateway VPC endpoint to access Amazon S3. Update the S3 bucket policy to accept connection from this gateway VPC endpoint.
C. Create a third VPC (VPC C) in ca-central-1. Create a cross-Region VPC peering connection between VPC C and VPC B in us-east-1. Use AWS PrivateLink with a Network Load Balancer (NLB) to expose the services in VPC A in ca-central-1. Use the interface VPC endpoint created with PrivateLink in VPC C to call the services.
D. Create a virtual private gateway, and attach it to VPC A in ca-central-1. Create an IPsec VPN connection between the EC2 instances in us-east-1 and the virtual private gateway. Grant the EC2 instances in us-east-1 direct access to the S3 bucket by adding a route to use the VPN connection to access Amazon S3.