Your company's logo is published as an image file across multiple websites that are hosted by your company. You have implemented Cloud CDN; however, you want to improve the performance of the cache hit ratio associated with this image file. What should you do?

A. Configure custom cache keys for the backend service that holds the image file, and clear the Host and Protocol checkboxes. B. Configure the default time to live (TTL) as 0 for the image file. C. Configure versioned URLs for each domain to serve users the image file before the cache entry expires. D. Configure Cloud Storage as a custom origin backend to host the image file, and select multi-region as the location type.