According to the results of national comorbidity survey (ncs), approximately one out of american adults has experienced the symptoms of a psychological disorder at some point in his or her lifetime.

The answer to this question is "one out of three". As per and according to the results of national comorbidity survey or the NCS, about approximately one out of 3 American who are adults has experienced and tried the symptoms of a psychological disorder at some point in his or her lifetime.

It’s either d or b ! but it might be b