The alternative causality means that two or more perpetrators have performed dangerous acts that may cause harm to others and have caused the consequences of the harm, but it is impossible to determine who is the perpetrator. According to the above definitions, Which of the following causal relationships are optional:. ["A poisons B in B's drinking water. After B drinks, he quarrels with C because of trivial matters before the poisoning. C Yi stabs B with a knife while angry.", "A and B have kidnapped C together. A is responsible for asking C's family for a ransom. In order to avoid being recognized by C, B cruelly kills C.", 'A and B people caused damage to the goods due to improper operation during the unloading process.', 'A. B, and C went out hunting with the same shotgun and bullets. A and B saw a prey appearing near C. Both shot at the same time, and one of them shot C.']