You have an Azure Cosmos DB for NoSQL database named DB1 that hosts a container named Contained. The partition key for Container! is /city.

You are developing a cloud-native app named App1 that will store customer information in DB1. App1 will perform transactional batch operations to update the items in Contained.

You need to configure App1 to meet the following requirements:

• Ensure that batch operations are rolled back if an item ' s ETag value has changed since the value was last read.

• Ensure that all operations in the batch apply to a single partition key value.

How should you complete the C# code? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.