B. Domestic abuse
Domestic abuse is an intentional injury. The abuser intends to inflict violence and cause injury.
Choking on food is unintentional as you can't choke on purpose, it's an accident. A sports-related injury could be intentional or unintentional. If a player inflicts an injury on another person on purpose then it's intentional harm, if a player has an accident then it's unintentional.