The correct options are Partition key and Provisioned throughput.

Partition key is a container level setting that determines how items are distributed across physical partitions and it directly affects scalability and performance. A well chosen partition key spreads load and storage evenly and changing it requires a data migration, so it is a container scoped decision that impacts partitioning and throughput behavior.

Provisioned throughput refers to the RUs per second allocated to the container and it directly controls how many requests the container can sustain and at what latency. Adjusting provisioned throughput at the container level will change performance and cost and is the primary way to scale a containers request capacity.

Read region is incorrect because read region placement and regional failover are configured at the account level and they influence replication topology and latency across regions rather than container level partitioning or the containers throughput setting.

Consistency level is incorrect because consistency is an account level default that determines read guarantees across replicas and it affects correctness and latency tradeoffs rather than the container level partition key or the containers provisioned throughput.

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