Which of the Following Is a Reason There Is Redistribution

Which of the following is a reason there is redistribution from those born later to those born earlier?

A) Social Security benefits diminish with age,and those born earlier lived longer.
B) Those born earlier paid into the system for only part of their lives but received benefits throughout their retirement.
C) The size of the payroll tax has remained constant over the years.
D) Social Security benefits have increased over the years in order to keep pace with inflation.