What can be inferred about the outcome of the accident mentioned?

The inference that he could have been killed suggests a serious potential outcome of the accident. This implies that the nature of the accident was extreme or dangerous, indicating that he faced significant risk. The phrasing allows for understanding that although he may have survived, the possibility of fatal consequences was present, reflecting the severity of the situation.

In the context of the other options, if he was not harmed at all or survived without injuries, it would not align with the recognition of the potential for a deadly outcome. Similarly, if he was only slightly injured, it would downplay the gravity of the accident. Therefore, the statement of him potentially being killed accurately captures the seriousness implied by the circumstances surrounding the accident.