An internet business is undertaking several data-related tasks to improve its operations and decision-making. Match the following tasks to the most appropriate data transformation technique:
- Task I: Combining sales figures from the company's website and physical store to get a unified view of overall sales.
- Task II: Analyzing customer behavior patterns on the website by grouping users based on their activity and purchase history.
- Task III: Adjusting revenue figures from international markets to a standard scale for fair comparison with domestic sales.
- Task IV: Reviewing customer feedback to focus only on responses related to a newly launched product line.
Choose the combination that correctly matches each task with the corresponding data transformation technique: