A developer is remotely fetching the reviews for a product.

For efficient caching of HTTP GET requests used to fetch product reviews, the best practice is to use a cached remote include combined with caching of the HTTP service itself (Answer D). This method involves caching the output of the remote service call at the service layer and reusing it for subsequent requests. This approach minimizes the number of calls to the remote service, reduces load times, and ensures that the displayed reviews are up-to-date as per the cache's freshness settings. It optimally balances the performance benefits of caching with the need to keep content like reviews current.