Which Statement Is True with Regard to Problems and Issues

Which statement is true with regard to problems and issues with tax-deferred retirement plans in the United States?

A) Inadequate participation in employer-sponsored retirement plans can create economic insecurity for retired employees.
B) Retirement benefits for women are higher than retirement benefits for men,reflecting the higher wages women are paid.
C) Employees do not invest sufficient amounts in the common stock issued by the companies where they work.
D) Pension benefits are too often indexed for inflation,burdening employers with high pension costs.