Margaret works for a privately held corporation. She contributes to her employer's retirement savings plan through regular payroll deductions. Her contributions are tax-deferred, and so are her earnings in the plan. Her employer matches part of her contributions. Margaret most likely participates in which of the following types of employer-sponsored retirement plans?
A.) Pension plan.
B.) Annuity.
C.) 401(k) plan.
D.) 403(b) plan
