Read the following context and choose the best option to answer the question.
Context: I had a dream about my mom again . She 's been dead for three years but I still have dreams about her . It 's like we were n't close when she was alive and I know she 's dead ( Finding and touching someone 's body makes you aware that " Hey , they are dead . " . )
Question: Why might they be having dreams about their mom ?
Options: 
- They 've been dead for three years
 - None of the above choices .
 - They were n't close when she was alive
 - They are finding someone 's body


None of the above choices .