How can I answer this question please? (pls zoom for clearer view)

Which of the following income distributions represents the most equal distribution of income? Distribution Counts 20 40 60 BO 100 120 Income (thousands of dollars) Distribution 50 40 Counts 30 20 50 100 150 200 Income (thousands of dollars) O Distribution 40 Counts 20 40 60 BO 100 120 Income (thousands of dollars) O Distribution 60 70 50 40 Counts 10 20 30 20 40 100 120 Income (thousands of dollars)