What is the BEST configuration for establishing VPN Communities for this company?

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

A.
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 Gateways option checked; all
London branch offices defined in one satellite window, but, all New York branch offices defined in
another satellite window.
B. Two mesh and one star Community: One mesh Community is set up for each of the
headquarters and its branch offices. The star Community is configured with London as the center
of the Community and New York is the satellite.

C.
Two star and one mesh Community: One star Community is set up for each site, with
headquarters as the Community center, and its branches as satellites. The mesh Community
includes only New York and London Gateways.

D.
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.