You are developing a solution by using the Azure Event Hubs SDK. You create a standard Azure Event Hub with 16 partitions. You implement eight event processor clients. You must balance the load dynamically when an event processor client fails. When an event processor client fails, another event processor must continue processing from the exact point at which the failure occurred. All events must be aggregated and uploaded to an Azure Blob storage account. You need to implement event processing recovery for the solution. Which SDK features should you use for the following requirement? “Ensure that event process clients mark the position within an event sequence”