Which of the Following Best Describes Relationship Marketing

Which of the following best describes relationship marketing?

A) For many suppliers, retaining their current customers has become a secondary focus in relationship marketing.
B) Business suppliers use social networking sites sparingly as these sites discourage businesses from shopping for all their needs.
C) Loyal customers are less profitable than those who are price sensitive and perceive no difference among brands or suppliers.
D) Relationship marketing has become more important than before because competition is becoming more intense.