To get the cumulative summary output, the component used is the "Scan" component.
Option A) Rollup - This option is incorrect because the Rollup component is used for grouping and aggregating data, but it does not provide cumulative summary output.
Option B) Scan - This option is correct because the Scan component is used to scan through the input data and calculate cumulative summary output.
Option C) Normalize - This option is incorrect because the Normalize component is used to transform data into a standardized format, but it does not provide cumulative summary output.
Option D) Replicate - This option is incorrect because the Replicate component is used to duplicate data across multiple nodes, but it does not provide cumulative summary output.
Therefore, the correct answer is B) Scan.