This dashboard visualizes BMW sales volumes across six global regions from 2010 to 2024, showing stacked bar charts for annual country comparisons, line charts for sales trends, a bar chart for top car models, and a pie chart for the 2024 regional distribution. The code uses D3.js v7 with SVG rendering, aggregating CSV data via `d3.rollups` and `d3.sum`. It employs `d3.scaleOrdinal` for color mapping, `d3.stack` for stacked series, and interactive tooltips on hover.