hard20 pts · first answer countscdnperformance

CDN cache hit ratio of 4 percent

A CloudFront distribution has a 4 percent cache hit ratio. Its cache policy includes all headers, all cookies and all query strings in the cache key. What is the main problem?

A.The origin server responds too slowly for CloudFront to cacheB.Every header, cookie and query variation is a separate cache entryC.The TTLs are set too long, so objects expire unpredictablyD.CloudFront only caches image files and skips other content types

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