Are there many workers in a modern technological society according to the author?
选项：

A: No. According to the author, not every one can become a worker.;
B:No. According to the author, only sixty per cent of the population can be called workers.;
C:No. According to the author, the figure of the workers is not big now, but it can become larger in the future.;
D:Yes. According to the author, there are many workers in a modern society.