【单选题】As a wise man once said, we are all ultimately alone. But an increasing number of Europeans are choosing to be so at an ever earlier age. This isn't the stuff of gloomy philosophical contemplations, b...
A.
they have entered the workforce at a much earlier age
B.
they are pessimistic about their economic future
C.
they have embraced a business culture of stability
D.
they are driven by an overwhelming sense of individualism