To Further Improve Customer Loyalty, an Investment Service Organization May

To further improve customer loyalty, an investment service organization may effectively use which of the following strategies?

A) A lost-customer analysis II. Free lessons for customers on how to make wise investments III. A customer panel to determine acceptability of a free quarterly newsletter highlighting the lives of long-term investors IV. Direct computer access to market information and investment analysis data for high-value customers
B) I and III only
C) I, II, III, and IV
D) II, III, and IV only
E) I only