What will happen in this scenario?

A user has created a VPC with CIDR 20.0.0.0/16. The user has created one subnet with CIDR 20.0.0.0/16 in this
VPC. The user is trying to create another subnet with the same VPC for CIDR 20.0.0.1/24. What will happen in
this scenario?

A.
The VPC will modify the first subnet CIDR automatically to allow the second subnet IP range

B.
It is not possible to create a subnet with the same CIDR as VPC

C.
The second subnet will be created

D.
It will throw a CIDR overlaps error

Explanation:

A Virtual Private Cloud (VPC. is a virtual network dedicated to the user’s AWS account. A user can create a
subnet with VPC and launch instances inside that subnet. The user can create a subnet with the same size of
VPC. However, he cannot create any other subnet since the CIDR of the second subnet will conflict with the
first subnet.