A SysOps Administrator is receiving multiple reports from customers that they are unable to connect to the company’s website. which is being served through Amazon CloudFront. Customers are receiving HTTP response codes for both 4XX and 5XX errors.
Which metric can the Administrator use to monitor the elevated error rates in CloudFront?

A. TotalErrorRate
B. RejectedConnectionCount
C. NetworkTransmitThroughput
D. HealthyHostCount