To meet the data requirements for App1, what should be deployed into each availability zone that contains an instance of App1?

An Azure Cosmos DB account configured for multi-region writes is the correct choice because it provides low-latency, highly available, and globally distributed data access with automatic data replication across multiple regions and availability zones. This configuration ensures that App1 instances in each availability zone can read and write data locally, meeting the requirement for high availability and performance within each zone. An Azure Data Lake Storage account configured with GZRS is incorrect because Data Lake Storage is primarily for big data analytics and doesn't offer the low-latency, transactional capabilities or multi-region write support required for an application like App1 that needs direct data access from multiple zones. An Azure Storage account configured with GZRS is incorrect because while it offers high durability and availability, it does not inherently provide the low-latency, multi-region write capabilities that Cosmos DB offers, which are crucial for applications needing active-active data access across zones.