Identify which of the following constitutional segments actively form the structural basis for India operating as a 'welfare state':
The Preamble's explicit commitment to securing social, economic, and political justice.
The Fundamental Rights' provisions enabling positive discrimination and upliftment of marginalized sectors.
The Directive Principles of State Policy's explicit mandates to foster social and economic democracy.
The Fundamental Duties' requirements imposing civic and moral obligations upon individual citizens.