A retail company runs their online shopping platform entirely on Oracle Cloud Infrastructure (OCI). This is a 3-tier web application that includes a 100 Mbps Load Balancer, Virtual Machine Instances for web and application tiers, and an Oracle DB Systems Virtual Machine. Due to unprecedented growth, they noticed an increase in the incoming traffic to their website and all users start getting 503 (Service Unavailable) errors. What is the potential problem in this scenario? (Choose the best answer.) 

Answer options:

A. You did not configure a Service Gateway to allow connection between web servers and Load Balancer.
B. The Traffic Management Policy is not set to Load Balancer the traffic to the web servers.
C. The Load Balancer health check status indicates critical situation for half of the backend web servers.
D. The Database is down hence users cannot access the web site.
E. All the web servers are too busy and not able to answer any request from users.

C