You have an Azure Data Factory pipeline that incrementally loads source data into an Azure Data Lake Storage Gen2 account. The data to be loaded is identified by a column named LastUpdatedDate in the source table. The pipeline is scheduled to run every four hours.

You need to ensure the pipeline execution meets the following requirements:

• Automatically retries if the run fails due to concurrency or throttling limits.
• Supports backfilling of existing data in the table.

Which trigger type should you use?