The only person I know who is more moody than me is my mother . And I was thinking about her symtpoms , and she could completely be bipolar . This revelation hit me last night as I was on the phone with her and she was freaking out , speaking very fast , being extremely negative about my job interview today saying it wo n't work out and the kids are going to suffer .

Question: What 's a possible reason the writer 's mother is bipolar ?
Answer: Because a revelation hit the writer .Because the writer was thinking about her symptoms .Because she experiences intense emotions .None of the above choices .