Watching TV before dozing off is one of the major cause of sleep deprivation, a condition that bothers one _____ three people and linked to increase risk of obesity, heart disease, and depression.
A)of
B)in
C)to
D)after
这题应该是要说三个中有一个人会因看电视而造成睡眠上的问题，想请问A和B的差别

one of the major causeS

Of感觉像在说有问题的只有这三人

是说这句之中的that表示什么阿~?

sleep deprivation, a condition that~名词 , 同为语 关代位

got it!