In the development of a machine learning project aimed at predicting customer churn for a telecommunications company, the team is in the initial stages of setting up their data pipeline. The project requires the integration of data from multiple sources including CRM systems, call detail records, and customer feedback forms. The team is discussing the phases of data preparation and processing. Considering the need for scalability, cost-efficiency, and compliance with data privacy regulations, which phase is primarily responsible for the collection and acquisition of data from these diverse sources? Choose one correct option.