Read the following context and choose the best option to answer the question.
Context: That was the first thing I wondered when I realized that he was n't joking . " He gazed at Goku again . " I suppose I 'll level with you ; we all know that Sanzo has not been himself lately . "
Question: What do we know about Sanzo ?
Options: 
- People are concerned about him .
 - He is the same as always .
 - He is joking .
 - He is their friend .


People are concerned about him .