Marilyn Peck,the Manager of Human Resources Makes the Following Statement

Marilyn Peck,the manager of human resources makes the following statement: "Our new incentive system is the best way to encourage high performance out of each employee.It specifies the things that employees should do and the results that will lead to rewards." David Witt,a production manager,responds by saying: "You ignore a key issue: no matter what else is going on,employees will not be motivated if they do not feel that they are being treated fairly.Workers who feel that they are paid less than others for the same work will not feel that they are being treated fairly unless the organization provides persuasive justification.For example,Robin cannot possibly be motivated given that she is paid much less than Jonaki."
If all of Witt's statements are true,which of the following must also be true?

A) If Robin were paid more than Jonaki,she would be motivated.
B) All employees who are motivated and feel that they are paid less than employees who do the same work have received a persuasive justification.
C) If Robin felt that she is being treated fairly,then she would be motivated.
D) Workers who are provided with a persuasive justification for differences in pay will be motivated.
E) Any employees who are not motivated and feel that they have been treated unfairly must not have received a persuasive justification.