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 . "
According to the above context, choose the best option to answer the following question.
Question: What do we know about Sanzo ?
Options:
A. He is their friend .
B. He is joking .
C. He is different than usual .
D. He is the same as always .


C