Exam 1z0-932 topic 1 question 94 discussion

Actual exam question from Oracle's 1z0-932

Question #: 94
Topic #: 1

You are designing a networking infrastructure in multiple Oracle Cloud Infrastructure regions and require connectivity between workloads in each region. You have created a dynamic routing gateway (DRG) and a remote peering connection. However, your workloads are unable to communicate with each other.
What are two reasons for this? (Choose two.)

A. The security lists associated with subnets in each virtual cloud network (VCN) do not have the appropriate ingress rules
B. Identity and Access Management (IAM) policies have not been defined to allow connectivity across the two VCNs in different regions
C. A local peering gateway needs to be created in each VCN with a default route rule added in the route table forwarding the traffic to the local peering gateway
D. An internet gateway needs to be created in each VCN with a default route rule added in the route table forwarding the traffic to the internet gateway
E. The route table associated with subnets in each VCN do not have a route rule defined to forward the traffic to their respective DRGs