Consider the following Terraform 0.12 configuration snippet:

VPC Cidr Block image

How would you define the 'cidr_block' for ap-southeast-1 in the aws_vpc resource using a variable? A: var.vpc_cidrs[“ap-southeast-1”] B: var.vpc_cidrs.0 C: vpc_cidrs[“ap-southeast-1”] D: var.vpc_cidrs[0]