Question 91:
You are designing a Cloudformation template to create a set of EC2 Instance and install an application package. You need to ensure that the stack is only successful if the software package gets installed successfully. How can you check this?
Answer options:
A.Use the cfn-signal helper script. B.Use the Change sets feature. C.Use Cloudwatch logs to signal the completion. D.Use Cloudtrail to signal the completion.