Read the following context and choose the best option to answer the question.
Context: " 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: Why would Sanzo frown in response to Hakkai making sure he felt all right ?
Options: 
- Hokkai may have thought it 's none of Sanzo 's business .
 - Sanzo may have watched none of Hokkai 's business .
 - Sanzo may have thought it 's none of Hokkai 's business .
 - None of the above choices .


Sanzo may have thought it 's none of Hokkai 's business .