Option C is the most appropriate choice for this scenario. AWS Lambda is a serverless compute service that can handle streaming data processing with low latency and high scalability. By using AWS Lambda with Amazon Kinesis Triggers, you can process real-time data streams from sources like Kinesis Data Streams or Kinesis Data Firehose. This approach eliminates the need to manage infrastructure and allows you to focus on processing the data. When processing streaming data, consider factors such as data ingestion rate, windowing and time management, fault tolerance, and output serialization.