问题详情

Which of the following statements is true？
A．Grown - ups like new stamps while young boys like used ones.
B．There are hundreds of kinds of stamps in the world.
C．Sometimes stamp collectors are willing to pay thousands of yuan or more for a used stamp.
D．A post - office worker does not want to buy any used stamps.请帮忙给出正确答案和分析，谢谢！