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: 
A. People are concerned about him .
B. He is the same as always .
C. He is joking .
D. He is their friend .


A