The sense of delayed gratification, of working now for later pleasure, has helped shape the economic behavior of our society. However, that sense is no longer nurtured as consistently in our children as it once was. For example, it used to take a bit of patience to put together the toys that children got in cereal boxes; now the toys come from the boxes whole.
Which of the following is an assumption of the passage above?
选C是说明,必须有这样一个前提,那就是以前培养孩子这种耐性的可能是由于put together这个toy都是一个孩子完成的,才有了这个patience的培养过程,要是不是一个孩子完成的,就不存在培养其耐性的过程了,也就不存在和今昔的对比。那作者的结论that sense is no longer nurtured as consistently in our children as it was once was又从何说起呢?