Scenario in May 2014, the European Union (EU)published a Report of of Population

Scenario
In May 2014, the European Union (EU) published a report of population structure and aging data that described growing trends of low birth rates and longer life expectancies in the EU. In their report, the EU described that due to these trends, some EU member states were beginning to demonstrate a population structure with many much-older individuals.
-Why might this changing population structure be a concern for EU leaders?

A) Eventually greater resources will be needed to support a much larger and older generation, and this burden will fall on an increasingly smaller workforce.
B) Eventually the EU population will exhibit a Type III survivorship curve.
C) Eventually intraspecific competition for resources amongst the older members of the population will lead to a decrease in food and water availability.
D) Eventually individuals of reproductive age will face a boom-and-bust population cycle.