A questionnaire has the following closed-ended question: What was your income last year? 0-10,000 10,001-20,000 20,001-30,000 >30,000 Analyzing the data, the researchers found that all men responded "10,001-20,000", while all women answered "20,001-30,000". In their final report, the researchers wrote: "Contrary to our hypotheses, we found that women earned twice as much as men". Question 38 options: Conclusion is not justified because income always needs to be measured on a ratio scale. Conclusion is not justified because there might be women who earn less than men The question lacks a feministic perspective. Conclusion is justified because income was measured on an ordinal scale Conclusion is not justified because income was not measured on a ratio scale