Which of the following statements is correct?

A) In part,Congress established pension plan rules to encourage individuals to save for retirement.
B) Retirement plans are generally not tax-free,only tax-deferred.
C) Individuals or companies usually establish a pension plan with a trustee.
D) All of the statements are correct.

All the statements provided are correct. A) Congress has indeed established rules for pension plans to encourage saving for retirement, such as the Employee Retirement Income Security Act (ERISA). B) Retirement plans are typically tax-deferred, meaning taxes are paid upon withdrawal, not tax-free. C) Pension plans are often established by individuals or companies with a trustee to manage the plan's assets.