单选题 Based on the essay, which of the following sentences is the best conclusion about the characteristics of a successful inventor?

A、 The person must be fascinating and interesting to other people.
B、 The person must be relaxed and able to work long hours.
C、 The person must go to specialized schools to learn the necessary skills.
D、 The person must be persistent and ambitious about inventing.

【正确答案】 D

【答案解析】从全文可以看出，成功的发明家应该对发明创造工作坚持不懈、雄心勃勃，Henry正是这样的。所以选D。而A选项说发明家应该对别人着迷，是不正确的；D选项说需要发明家放松，能工作很长时间，文中并没有提到；C选项说需要去专门的学校学习技能也是不对的， Henry就没有到这样的学校学习过。