Zhang was dead, and the forensic doctor found out that he had been poisoned. Zhang's two neighbors, A and B, said to police officer Zhao who came to investigate: A: If Zhang died of murder, his wife Li could not get rid of the relationship, During this time, she was divorced with Zhang; B: Zhang either died of suicide or murder. It could not be an accident. After hearing what A and B said, Police Officer Zhao made the following two judgments: (1) If A If B and B are all right or wrong, then Zhang died by accident; (2) If one of A and B said something wrong, then Zhang did not die by accident. Later After investigating the facts, it was found that Officer Zhao's judgment was correct. Based on the above information, which of the following can be derived? ['Zhang died of murder.', 'Zhang died of suicide.', 'Zhang died of an accident.', 'Lee killed Zhang.']