Which one of the following is not a sub-index of the World Bank's 'Ease of Doing Business Index'?

The World Bank's 'Ease of Doing Business Index' measures regulations directly affecting ten stages of a business's life cycle. These ten indicators are: 1. Starting a Business 2. Dealing with Construction Permits 3. Getting Electricity 4. Registering Property 5. Getting Credit 6. Protecting Minority Investors 7. Paying Taxes 8. Trading Across Borders 9. Enforcing Contracts 10. Resolving Insolvency Maintenance of law and order, while crucial for a conducive business environment, is a broader governance aspect and not a specific sub-index used to calculate the 'Ease of Doing Business Index'. The other options listed – Paying taxes, Registering property, and Dealing with construction permits – are indeed direct sub-indices of this report.