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 . "

Based on the preceding passage, choose your answer for question Why is the narrator wary of Sanzo 's recent behavior ?
OPT:
a). Sanzo is showing signs of sadness .
b). Sanzo is showing signs of anger .
c). Sanzo is showing signs of excitement .
d). Sanzo is showing signs of excellence .
The answer is:
a).