" I thought I 'd make sure you were feeling all right . " Sanzo 's eyes narrowed in a frown . Hakkai 's brow furrowed slightly as he continued , watching Sanzo intently .

Question: What is the reason for Sanzo 's eyes narrowing ?
Answer: None of the above choices .His brow was sweaty .He was trying to focus his eyes better .Sanzo was dubious about hakkai 's intent .