According to the chapter on Marketing Implementation by David Loudon, which of the following statements is TRUE regarding internal marketing?

Select one:

a$.$ Internal marketing requires a firm to develop and assess the effectiveness of training programs for segments of employees

b$.$ Internal marketing efforts are the sole responsibility of the marketing department; no other department is involved in any portion of the process.

c$.$ Internal marketing efforts need only be targeted at employees who come into contact with customers.

d$.$ Internal marketing refers to persuading employees and managers of the firm to purchase the goods manufactured by the company.