" 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 Hakkai 's brow furrowed ?
Answer: None of the above choices .He wanted to pretend to look in a different direction .Hakkai was n't trusting Sanzo .The eyes and brow furrowed at each other in a battle of " who can stare the longest " .