An accounting firm has created a set of CloudFormation stacks which are used to deploy various application environments in their VPC. Due to the tax filing season, one of the underlying EC2 Instances which was launched as part of the CloudFormation stack needs to be changed and upgraded to a higher Instance type. Which of the following is the best way to implement this change?a. Launch a new CloudFormation template and deploy it to their VPC. b. Directly make the changes to the current CloudFormation stack settings. c. Launch a new CloudFormation template to their VPC and delete the older stack. d. Launch a new larger EC2 instance and add it to the existing stack.