A global retail company with contact centers in North America (NA), Europe (EU), and Asia-Pacific (APAC) is consolidating its Genesys WFM 8 infrastructure. Each region has its own set of public holidays and business hours. The company wants to maintain a centralized WFM administration while allowing regional managers to manage their own site-specific events, such as local training days or team outings. The goal is to ensure that global holidays (like New Year's Day) are applied to all sites, while regional and site-specific events only affect the relevant locations. Which configuration strategy in WFM Builder is the most effective and maintainable for achieving this hierarchical calendar management? ```mermaid graph TD subgraph Global_WFM_Admin Central_Config[Central Configuration] end subgraph NA_Region[NA Region] NA_Site1[New York Site] NA_Site2[Toronto Site] end subgraph EU_Region[EU Region] EU_Site1[London Site] end subgraph APAC_Region[APAC Region] APAC_Site1[Tokyo Site] end Central_Config --> NA_Region Central_Config --> EU_Region Central_Config --> APAC_Region ```