question: business:performance
choices.label: A B C D
choices.text: work:income reality:fantasy surgery:efficacy input:output
explanation: "performance" measures the level of "business". the level of "work" cannot be measured by "income". "reality" and "fantasy" have opposite meanings. "efficacy" can measure the "surgery" effect. without "input", there is no "output", and "input" cannot be used to measure "output".
relation: business performance R3.10
relation: reality fantasy R1.2
relation: surgery efficacy R3.10
relation: input output R5.4