question: produce:profit
choices.label: A B C D
choices.text: invest:benefit operate:tax capital:income principal:return
explanation: the purpose of "producing" is to obtain "profit", and "produce" is a verb. the purpose of "investing" is to obtain "benefit", and "invest" is a verb. the purpose of "operating" is not to earn "taxes". investing in "capital" can get "income", but "capital" is a noun. investing in "principal" can get a "return", but "principal" is a noun.
relation: produce profit R3.9
relation: invest benefit R3.9
relation: capital income R3.9
relation: principal return R3.9