You are creating CloudFormation templates for new applications. In the templates, you need to include certain custom resources as they are not supported by the AWS CloudFormation resource types. You want to use the AWS::CloudFormation::CustomResource resource type to specify the custom resources. The resource type has a ServiceToken property that determines where AWS CloudFormation sends requests to. Which of the following endpoints can you configure in the ServiceToken property? (Select TWO.)

Answer options:

A.An Amazon SNS topic ARN.
B.An Amazon SQS queue ARN.
C.A CloudWatch Event rule ARN.
D.An AWS Step Function name.
E.A Lambda function ARN.

Correct Answers: A & E
Option A is CORRECT because you can configure an SNS topic ARN to receive the service token such as "arn:aws:sns:us-east-1:84969EXAMPLE:CRTest".
Options B, C and D are incorrect because you cannot configure SQS, CloudWatch Event rule or Step Function in the ServiceToken property.
Option E is CORRECT because a CloudFormation custom resource can send the service token to a Lambda function. Please check the following references for the details.
References:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-custom-resources.html,
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cfn-customresource.html