The principle says death caused by a rash or negligent act is an offence. X drove his SUV at 160 kilometres per hour on a lonely road leading into a forest, and when a person suddenly appeared from the forest, the resulting accident killed that commuter.
Since driving at such extreme speed on a road where pedestrians could reasonably appear is itself rash conduct, and that conduct directly caused a death, the facts fit the principle squarely.
Therefore, the correct answer is X is guilty of an offence death by rash or negligent act.
The fact that decides this question is the manner of driving itself, 160 kilometres per hour on a road leading into a forest where people could appear. The principle keys entirely on rashness or negligence, not on location, intention, or what happened to the driver, so each option should be tested against that one fact.
Testing every option against the manner of driving itself, rather than against location, intention, or aftermath, leaves only the option finding X guilty of a rash or negligent act.
Therefore, the correct answer is X is guilty of an offence death by rash or negligent act.