Which of the following is an important lesson that expectancy theory teaches HR managers? a. Expectancy theory undermines the importance of selecting the right employees for a job. b. Expectancy theory suggests that organizations can best influence performance by establishing clear links between ability and efforts. c. Expectancy theory suggests that it is important for organizations to have many desirable outcomes associated with improved performance. d. Expectancy theory posits that employees must not play a role in decision making