The suggested answer is A, C.
The global configuration is synchronized between the primary and secondary FortiGate devices, as indicated by the matching checksums in the 'global' section. The all VDOM is not synchronized between the primary and secondary FortiGate devices, as indicated by the differing checksums in the 'all' section. The root VDOM checksum differences indicate potential configuration issues, but the lack of synchronization, especially in the 'all' section, is a key indicator that the synchronization is not consistent. Therefore, the most accurate conclusions are that the global configuration is synchronized, while the all VDOM is not.