问题补充：
parents and their children often disagree about the the amount of freedom and responsibility that young people
答案：
选Bbe to have的意思是：应该有,跟句子里的意思符合
假如A是should have,那就可以,但would 没有应该的意思
C是肯定不对的
D：be about to have是指将要发生的事,跟自己的意愿无关,比如：the train is about to leave.
======以下答案可供参考======
供参考答案1:
B 表示年轻人“应该”得到的自由和承担的责任
供参考答案2:
A,
