You are an administrator with an application running on Oracle Cloud Infrastructure (OCI). The company has a fleet of OCI compute virtual instances behind a load balancer. The load balancer backend set health check API is providing a ‘Critical’ level warning. You have confirmed that your application is running healthy on the backend servers.
What is the possible reason for this ‘Critical’ warning?
A. The load balancer listener is not configured correctly.
B. A user does not have correct Identity and Access Management (IAM) credentials on the backend servers.
C. The security list associated with the subnet in which the backend server is provisined does not include the IP range for the source of the health check requests.
D. The route table associated with the subnet in which the backend server is provisoned does not include the route for OCI load balancer.
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