Answer:
A. Murder.
Step-by-step explanation:
The given situation describes that it is a murder case as the husband fired to the neighbor by a single shot which is totally unlawful as the husband needs to talk to his wife and neighbor to settle this and threaten him too far away from his wife. If they don't stop so her husband should involve the cops to settle this either by divorce or any other thing.
But he should not shot him as his life would be destroyed due to anger he took this step.
Therefore this is the case of murder.