Explanation: Research carried out on people with OCD has shown that they are diagnosed at early child hood and tend to build to he part of there normal way of life .This can be one of the reasons why if they don't do their normal routines they feel unrest.
Reports also show that some people with OCD are aware, while some are unaware of this disorder, this eliminates options B and C as there are classifications of people that option B and C is referring to. While option D which says "more likely to be male than female" is not what report shows as it says females are likely to have OCDs than males.
Option A is the best fit to the people that has OCDs.
An example would be if a president were focusing one thing and the next day there is a story of bombings on tv he may be more compelled to do something about it.
