Your organization is running a Firestore-backed Firebase app that serves the same top ten news stories on a daily basis to a large global audience. You want to optimize content delivery while decreasing cost and latency. What should you do?
A.
Enable serializable isolation in the Firebase app.
B.
Deploy a US multi-region Firestore location.
C.
Build a Firestore bundle, and deploy bundles to Cloud CDN.
D.
Create a Firestore index on the news story date.
C.
Must decrease cost and latency. Creating or deploying anything would likely cost more, so eliminate B and D. That leaves A and C. A global audience strongly suggests serving content via Google’s Content Delivery Network. Changing the isolation level won’t decrease cost or latency, so C is the best answer.
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