If the Link Between Performance and Reward Is Broken in the Expectancy

If the link between performance and reward is broken in the expectancy theory, employees will not be motivated. Which of the following is an example of a broken
Link?

A) A professor who tells his class he never gives an "A" grade.
B) A professor who tells his class he gives "A"s only to students who attend every class.
C) A professor who tells his class he gives "A"s to students who submit projects with original ideas.
D) A professor who tells his class he gives "B"s if projects are not submitted on time.