The Social Security Trust Fund, the Special Government Account from Which

The Social Security Trust Fund, the special government account from which Social Security payments are made, is projected to experience a shortfall in the future because

A) there will be fewer young workers paying into the system relative to the number of retirees receiving Social Security benefits.
B) the size of the benefits given to retirees is legally required to double every 15 years.
C) Congress passed a tax reform law in 2017 that eliminated the revenue used to fund retirement benefits.
D) the federal government is replacing Social Security with a new retirement system based on private 401k accounts.