She knelt down just infront of him , a hand grabbing the top of his helmet as she tried to study his eyes , wondering why he was n't able to see . " Hold still . " She snorted angerly , annoyed . " And do n't worry about me , I ' m fine .
According to the above context, choose the best option to answer the following question.
Question: What may have happened before he was unable to see ?
Options:
- He may have been blind to begin with .
 - He may have gotten glass in his eye .
 - He may have crashed his bike .
 - He may have gotten a chemical in his eye .


He may have crashed his bike .