Which of the Following Is True of Federal Legislations on Retirement

Which of the following is true of federal legislations on retirement plans?

A) Social Security is intended to be a person's sole retirement income.
B) Employers are required to pay the full amount for the taxes collected as part of the Social Security program.
C) Pensions must be vested in the employer after five years of employment.
D) Employees should take retirement in a form that provides the spouse with a pension after the worker's death.