Rex Is a Salesperson Who Works for Welwin Inc

Rex is a salesperson who works for Welwin Inc., a manufacturer of computer accessories. With several years of experience as a salesperson, Rex has the persuasive ability to convert undecided customers to first-time buyers. Identify his task in providing an after-sale service.

A) He reassures Welwin's product superiority through product comparisons and demonstrations.
B) He clearly differentiates features of Welwin's products from those of competitors.
C) He sells additional and complementary items to repeat customers.
D) He tends to the needs of dissatisfied customers.