A、 They strongly believe in family rules.
B、 They are very likely to succeed in life.
C、 They tend to take responsibility for themselves.
D、 They are in the habit of obeying their parents.

【正确答案】 B

【答案解析】解析：信息明示题。文中指出that oldest children are smart and strong-willed．They are very likely to be successful．和An only child will succeed for the same reason，由此可知人们常常认为家庭中年龄最大的孩子未来会取得成功。独生子女也一样。所以选项B正确。

A、 They grow up to be funny and charming.
B、 They often have a poor sense of direction.
C、 They get less attention from their parents.
D、 They tend to be smart and strong-willed.

【正确答案】 C

【答案解析】解析：信息明示题。文中指出Middle children don’t get so much attention。故家中排行中间的孩子常得不到父母足够的关心照顾。所以选C。

A、 They usually don' t follow family rules.
B、 They don' t like to take chances in their lives.
C、 They are less likely to be successful in life.
D、 They tend to believe in their parent' s ideas.

【正确答案】 A

【答案解析】解析：事实细节题。文章最后指出最近一项研究表明Rules didn’t mean as much to later children in the family，即later children不会遵守家庭规则。故选A。