Which is NOT a method of improving the outside option to welfare in order to reduce moral hazard problems?

Question

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A, B, and D are all methods of improving the outside option to welfare in order to reduce moral hazard problems. A provides job skills training to help welfare recipients find better employment opportunities, B directly subsidizes market wages to increase the attractiveness of work relative to welfare, and D enforces child support obligations, which increases the income of single mothers who work but do not receive welfare. On the other hand, C (using ordeal mechanisms) is not a method of improving the outside option to welfare. Ordeal mechanisms are used to screen out those who are not truly in need of welfare, but they do not directly improve the outside option.

Which Is NOT a Method of Improving the Outside Option