How can the user configure this?

A user is using Cloudformation to launch an EC2 instance and then configure an application after the instance
is launched. The user wants the stack creation of ELB and AutoScaling to wait until the EC2 instance is launched
and configured properly. How can the user configure this?

A.
It is not possible that the stack creation will wait until one service is created and launched

B.
The user can use the HoldCondition resource to wait for the creation of the other dependent
resources

C.
The user can use the DependentCondition resource to hold the creation of the other dependent
resources

D.
The user can use the WaitCondition resource to hold the creation of the other dependent resources

Explanation:
AWS Cloudformation is an application management tool which provides application modelling, deployment,
configuration, management and related activities. AWS CloudFormation provides a WaitCondition resource
which acts as a barrier and blocks the creation of other resources until a completion signal is received from an
external source, such as a user application or management system.