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?

A.     The toys in cereal boxes have changed partly because the economic conditions of our society have improved.

B.       The influence of promotion gimmicks on the economic behavior of our society has increased over the years.

C.      The toys that used to come in cereal boxes were put together by the same children who played with them.

D.      Part of the pleasure of any toy lie in putting the toy together before playing with it.

E.       Today's children do not expect a single toy to provide pleasure for a long period of time.

答案C，不太明白，请各位指导。

题干说的是：delayed gratification 出现在一番辛苦的劳动后。即我们常说的先苦后甜。但是这种观念已经不能再现在的幼儿成长经历中得到培养。然后他举了个例子来证明，比如说之前小孩子得到的玩具（积木？），都是盒子里面乱作一团，需要辛苦的拼好后才可以(play).而现在他们得到的玩具都是已经拼好了放在盒子里--言下之意，不用经过那番先苦后甜的拼拼装装的过程就是玩了。

所以最直接的一个assumption,就是说先前那段先苦后甜的经历是发生在一个小孩子身上。否则delayed gratification就得不到体现。