What should the solutions architect do to meet this requirement?

A company is concerned about the security of its public web application due to recent web attacks. The application uses an Application Load Balancer (ALB). A solutions architect must reduce the risk of DDoS attacks against the application

What should the solutions architect do to meet this requirement?
A . Add an Amazon Inspector agent to the ALB
B . Configure Amazon Made to prevent attacks.
C . Enable AWS Shield Advanced to prevent attacks.
D . Configure Amazon GuardDuty to monitor the ALB

Answer: C