C. AWS Shield
D. AWS Shield Advanced
Explanation :
The AWS Documentation mentions the following:
AWS Shield – All AWS customers benefit from the automatic protections of AWS Shield Standard, at no additional charge. AWS Shield Standard defends against most common, frequently occurring network and transport layer DDoS attacks that target your web site or applications
AWS Shield Advanced – For higher levels of protection against attacks targeting your web applications running on Amazon EC2, Elastic Load Balancing (ELB), CloudFront, and Route 53 resources, you can subscribe to AWS Shield Advanced. AWS Shield Advanced provides expanded DDoS attack protection for these resources.
