Which of the Following Statements Is Not Correct

Which of the following statements is not correct?

A) Employers pay salaries or wages to their employees in exchange for their labor.
B) Salaries are paid on a periodic basis as a fixed installment of an agreed upon total amount defined as the remuneration for the person making her or his services available to the employer for an agreed upon annual number of hours.
C) Salaries are dependent on the level of occupation the employer will be able to provide.
D) Wages refer to the payment of an amount defined by an agreed hourly rate or piecework applied to the actual number of units of labor provided during the period for which the wages are calculated.