A Data Analyst is creating a map that includes multiple data layers at country, state,...

Tableau ' s Layer Control is specifically designed for maps containing multiple geographic mark layers. When enabled, it gives users an interactive panel from which individual map layers can be shown or hidden and interactions with particular layers can also be enabled or disabled. Tableau Desktop authors enable this feature through Map > Map Options > Layer Control before publishing the workbook. A parameter could theoretically drive custom calculations, but it is unnecessary because Tableau already supplies native layer-visibility controls. The Filter shelf filters underlying data values rather than directly controlling geographic mark-layer visibility. A dual-axis map is also unnecessary and is more limited than Tableau ' s current multi-layer mapping architecture. Therefore, C is the direct, officially supported method for allowing users to toggle map layers independently.