Your company has two headquarters, one in London, one in New York. Each of the headquarters includes several branch offi

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Your company has two headquarters, one in London, one in New York. Each of the headquarters includes several branch offices. The branch offices only need to communicate with the headquarters in their country, not with each other, and the headquarters need to communicate directly. What is the BEST configuration for establishing VPN Communities among the branch offices and their headquarters, and between the two headquarters? VPN Communities comprised of:

A. Three mesh Communities: one for London headquarters and its branches; one for New York headquarters and its branches; and one for London and New York headquarters.
B. Two mesh and one star Community: Each mesh Community is set up for each site between headquarters their branches. The star Community has New York as the center and London as its satellite.
C. Two star communities and one mesh: A star community for each city with headquarters as center, and branches as satellites. Then one mesh community for the two headquarters.
D. One star Community with the option to mesh the center of the star: New York and London Gateways added to the center of the star with the "mesh center