Which of the Following Is/are Based on an Ability-To-Pay Concept

Multiple Choice

Which of the following is/are based on an ability-to-pay concept?
I.A flat tax .
II.Johson City charges all households a flat fee of $25 per month for water usage.
III.Boone County recently established Route 89 as a toll road. All cars traveling from East Johnson City to Appleton pay $1.
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A) Only statement I is correct.
B) Only statement II is correct.
C) Statements II and III are correct
D) Statements I, II, and III are correct.
E) None of the statements are correct.