This example shows a bare minimum HTML page that renders the text "Hello, World" in a web browser. It demonstrates the simplest possible setup for integrating D3.js into a webpage by loading the library from a CDN and linking to an external JavaScript file. The code uses the `select` function from D3 in an `index.js` file, though no specific data or visualization is yet defined. It serves as a starting point for building more complex data-driven graphics with D3 within a plain HTML document.