We do n't really need to talk it out , we just seem to have one of those rare connections . I do n't have to tell him what I need or how I ' m feeling - he just knows . An vice - versa . I do n't know what it is , but somehow it works .
According to the above context, choose the best option to answer the following question.
Question: What may be the reason they have such a connection ?
Options:
- None of the above choices .
 - They can read each others minds using an app .
 - They have been together for a really long time .
 - They were adopted when they were both adults .


They have been together for a really long time .