question: vinegar:disinfect
choices.label: A B C D
choices.text: sugar:flavoring ginseng:nourishing water heater:heating gasoline:remove stains
explanation: "vinegar" can be used to "disinfect", seasoning is the main function of "vinegar", and "disinfection" is only an auxiliary function. "flavoring" is the main function of "white sugar", not an auxiliary function. "nourishing" is the main function of "ginseng", not an auxiliary function. "heating" is the primary function of a "water heater", not an auxiliary function. "gasoline" can "remove stains", providing power as fuel is the main function of "gasoline", and "stain removal" is only an auxiliary function.
relation: vinegar disinfect R3.3
relation: sugar flavoring R3.3
relation: ginseng nourishing R3.3
relation: water heater heating R3.3
relation: gasoline remove stains R3.3