Which of the following can be learned from Para.2？A．People over 50 spend less money on lux

Which of the following can be learned from Para.2？

A．People over 50 spend less money on luxury items.

B．Young people have become more economic because they earn less money.

C．The increase of older generations has helped growth of American economy.

D．Middle-aged or elderly models are more welcome in American commercials today.