Which rules should appear in the route table of VPC A after configuration?

Explanations:

This entry is necessary for VPC A’s route table to recognize local traffic within its own CIDR block (10.0.0.0/16), allowing instances within VPC A to communicate with each other.

This entry is not needed in VPC A’s route table. VPC A does not need to route traffic destined for VPC B (172.31.0.0/16) locally, as it is not part of VPC A’s address space.

This entry is incorrect because traffic destined for VPC A’s own CIDR block (10.0.0.0/16) does not need to be routed through the peering connection; it is handled locally.

This entry is essential for enabling VPC A to route traffic to VPC B via the peering connection (pcx-12345). It ensures that any traffic meant for the CIDR block of VPC B (172.31.0.0/16) goes through the established peering connection.

This entry is incorrect as it suggests routing traffic from VPC A (10.0.0.0/16) to VPC B (172.31.0.0/16) using the address of the other VPC instead of the peering connection. VPC A only needs to route traffic for its own address space locally.