You have an Azure DevOps project that uses multiple package feeds. You want to consolidate to a single feed that stores packages produced internally and consumes packages from remote feeds. The solution must support both public feeds and authenticated feeds. Which feature should you enable in Azure DevOps?

Upstream sources in Azure Artifacts allow a single feed to consume packages from other feeds, including public registries like NuGet.org and npmjs.com, as well as other Azure Artifacts feeds (authenticated or not). This consolidation simplifies package management by providing a single point of access for all dependencies, whether internal or external. Universal Packages are a type of package format, not a feature for consolidating feeds. Views in Azure Artifacts are used to filter packages within a feed, not to combine multiple feeds. A symbol server stores debugging symbols and is unrelated to package feed consolidation.