Read the following context and choose the best option to answer the question.
Context: Apparently he 's home from the rehabilitation center and grumping around the house with his usual vigor . Did you know that ? I did n't . I stopped on the way home to visit Grandma and he came out from the kitchen . That 's how I found out . Everyone seemed in good spirits .
Question: Why was he grumping around the house with his usual vigor ?
Options: 
- he was having a psychotic break again
 - he could n't believe it was me
 - he recovered fast and well from since his time in the rehabilitation center
 - None of the above choices .


he recovered fast and well from since his time in the rehabilitation center