Activities involved in the Customer Relationship Management (CRM) macro process include

A) planning of internal production and storage.
B) order fulfillment.
C) marketing.
D) supply planning.

CRM focuses on managing a company's interactions with current and potential customers, involving strategies and technologies to analyze customer interactions and data throughout the customer lifecycle. Marketing is a core component of CRM, aiming to improve business relationships with customers, specifically focusing on customer retention and ultimately driving sales growth. Other options like planning of internal production and storage, order fulfillment, and supply planning are more closely related to operations management and supply chain management rather than CRM.