Unlawfully killing another person without planning in advance.

• A. Voluntary manslaughter
• B. Involuntary manslaughter
• C. Murder
• D. Manslaughter

Answer: (D)

The key idea is that murder requires malice aforethought, often shown by planning to kill. If there’s no planning in advance, the mental state isn’t malicious enough for murder. The description “unlawfully killing another person without planning in advance” fits the category of manslaughter, which covers killings lacking premeditation. Manslaughter includes situations like killings in the heat of passion or those caused by reckless or negligent conduct, depending on the facts. Without more detail about provocation or negligence, the broad label is the best fit because it explicitly excludes premeditation, which is what separates murder from manslaughter. If later facts showed deliberate killing in response to provocation, it could be voluntary manslaughter; if it showed gross negligence or a crime leading to death, it could be involuntary manslaughter.