请教一道逻辑题，实在想不明白

Shy adolescents often devote themselves totally to a hobby to help distract them from the loneliness brought on by their shyness. Sometimes they are able to become friends with others who share their hobby. But if they lose interest in that hobby, their loneliness may be exacerbated. So developing an all-consuming hobby is not a successful strategy for overcoming adolescent loneliness.

Which one of the following assumptions does the argument depend on?

(A) Eventually, shy adolescents are going to want a wider circle of friends than is provided by their hobby.

(B) No successful strategy for overcoming adolescent loneliness ever intensifies that loneliness.

(C) Shy adolescents will lose interest in their hobbies if they do not make friends through their engagement in those hobbies.

(D) Some other strategy for overcoming adolescent loneliness is generally more successful than is developing an all-consuming hobby.（B）

(E) Shy adolescents devote themselves to hobbies mainly because they want to make friends.

说shy的人通过找到hobby可以消除loneliness，但是如果对hobby热情降低，lonely又回来了。

结论是就算有一个all-consuming 的hobby对这些人也没有用

我就想不通为是那么B是Assumption了，哪位NN能解释一下呀？

觉得原文从“hobby热情降低，lonely更厉害”推出“STRATEGY不成功”。可理解为作者认为所有最后加深lonely的strategy都是不成功的=作者假设成功的strategy不会加深londly，即b.

明白啦，醍醐灌顶啊

多谢！！！！！