You are adding more spoke VPCs to an existing hub and spoke topology Your goal...

The correct answer is D. CloudWatch and S3.

According to the GitHub repository for the Fortinet aws-lambda-tgw script1, this function requires the following AWS services:

CloudWatch: A monitoring and observability service that collects and processes events from various AWS resources, including Transit Gateway attachments and route tables.

S3: A scalable object storage service that can store the configuration files and logs generated by the Lambda function.

By using the Fortinet aws-lambda-tgw script, you can automate the creation and configuration of Transit Gateway Connect attachments for your FortiGate devices. This can help you save time and avoid errors when adding more spoke VPCs to an existing hub and spoke topology1.

The other AWS services mentioned in the options are not required for this task. GuardDuty is a threat detection service that monitors for malicious and unauthorized behavior to help protect AWS accounts and workloads. WAF is a web application firewall that helps protect web applications from common web exploits. Inspector is a security assessment service that helps improve the security and compliance of applications deployed on AWS. DynamoDB is a fast and flexible NoSQL database service that can store various types of data.

1: GitHub - fortinet/aws-lambda-tgw