Which of the Following Best Describes a "Defined Benefit Plan

Which of the following best describes a "defined benefit plan"?

A) High returns in the pension plan result in higher benefit payments to the employees in the future.
B) A pension plan that specifies how much funds the employee needs to contribute.
C) A plan that requires the employer to contribute $10 per hour worked by an employee.
D) A plan that specifies how much in pension payments employees will receive in their retirement.