" That 's why I thought you might be ill . " Sanzo 's frown deepened as he stared at the ground and ran a hand through his hair in distraction . " ... I ' m sorry , " he mumbled , shocking Hakkai and not paying attention at all to what he was saying as he retreated back inside .

Question: What may be the reason he retreated back insde ?
Answer: He was afraid he was going to get attacked .He needed to use the bathroom that very moment .He was hungry and wanted something to eat .None of the above choices .