How Did Demographic Changes Undermine the European Welfare States in the 1970s

How did demographic changes undermine the European welfare states in the 1970s?

A) A rise in immigration resulted in resentment toward people who were seen as unfairly benefiting from governments services.
B) Declining birthrates created an imbalance between people paying into the system and those drawing benefits.
C) A baby boom resulted in overcrowded schools and overwhelmed national healthcare providers.
D) Delayed retirement by union members until very late in life prevented young people from being able to find jobs.
E) Large numbers of working mothers created the need for expensive daycare and preschool programs.