Tom's Terrific Assembly Company Promises Its Employees a 10-Percent Raise

Tom's Terrific Assembly Company promises its employees a 10-percent raise at the end of the year if productivity has increased and manage?ment feels it is warranted.Tom's must

A) do nothing.
B) give the employees a 10-percent raise only at the end of the year.
C) give the employees a 10-percent raise only if produc?tivity increases.
D) give the employees a 10-percent raise under any circumstances.