If a user finds that the Content Delivery Network (CDN) cache hit rate is low, what could be the reason? (Number of correct answers: 3)

If a user finds that the Content Delivery Network (CDN) cache hit rate is low, what could be the reason? (Number of correct answers: 3)
A . When the website has low traffic, the CDN will receive fewer requests and this will result in a lower cache hit rate.
B . Insufficient bandwidth was selected when enabling the CDN service, causing the service capacity reach its limit too early.
C . HTTP Header settings may cause cache misses.
D . The origin site has a large number of dynamic resources.
E . Cache configuration is inappropriate (ex. overly short Cache Expiry Time for popular files).

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Answer: A,B,E