Which of the Following Is the Definition of Customer Relationship

Which of the following is the definition of customer relationship management (CRM) ?

A) CRM refers to "the process of planning and executing the conception, pricing, promotion, and distribution of ideas, goods and services to create exchanges that satisfy individual and organizational objectives."
B) CRM refers to the "dynamic interpersonal processes that stimulate the initiation, direction, intensity, and persistence of work-related behaviors of salespeople toward attaining organizational goals and objectives"
C) CRM refers to "the emotional process of exercising psychological, social, and inspirational influence on individual salespeople and the sales force collectively toward the achievement of organizational objectives, goals, and values"
D) CRM refers to "the idea that developing closer relationships with customers is the best way to satisfy customers and achieve purchasing loyalty, and that loyal customers are more profitable than non-loyal."