Your team has created a cloudformation template. The template consists of a creation of a Virtual private gateway , Customer gateway and a VPN connection based on the created artefacts. The templates sometimes give errors since the routes are not being added because of the missing Virtual private gateway resource. How can you resolve this?

Answer options:

A.Change the order of the creation of the resources in the template.
B.Add a "Depends On" attribute to the VGW on the Route table.
C.Ensure the route table has a "Depends On" attribute with a value of VGW.
D.Add a custom resource to the template for the Route Table entry.

Answer - C
The AWS Documentation mentions the following
With the DependsOn attribute you can specify that the creation of a specific resource follows another. When you add a DependsOn attribute to a resource, that resource is created only after the creation of the resource specified in the DependsOn attribute.
Option A is invalid because the order will not resolve the problem
Option B is invalid because it should be the other way around , there should be a DependsOn attribute to the RouteTable entry on the VGW
Option D is invalid because a custom resource will not resolve the problem
For more information on Cloudformation DependsOn attribute, please refer to below URL:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-dependson.html