You are designing an Azure Cosmos DB database for an IoT application that tracks vehicle telemetry.

The database will store millions of documents per day. You need to select a partition key. The most common query will retrieve all telemetry for a specific vehicle on a specific date.

Which TWO characteristics describe a good partition key for this workload? (Select TWO)

In Cosmos DB, choosing the right partition key is critical for scalability. A good partition key must have high cardinality (a large number of distinct values) to ensure data can be spread across many physical partitions as the database grows. It must also distribute storage and compute (Request Units) evenly to avoid 'hot partitions'. For this scenario, a synthetic key like `VehicleID-Date` would be ideal, as it has high cardinality and matches the most common query pattern.