Say That an Economic Model Concludes That "Government Raising Payroll

Say that an economic model concludes that "government raising payroll taxes is a measure that can maintain current Social Security benefit levels for every retiree." This conclusion is:

A) a normative statement because there is disagreement over whether Social Security benefits should be maintained.
B) a positive statement because raising payroll taxes is one way to maintain Social Security benefits.
C) a statement in the art of economics because it is about policy.
D) false because there is no payroll tax rate high enough to maintain current benefits.