Which statement about the relationship between gateways and route groups is true?
A. Each gateway can belong to only one route group and can be listed only once within that route group.
B. Each gateway can belong to only one route group and can be listed multiple times within that route group.
C. Each gateway can belong to multiple route groups and can be listed only once within each route group.
D. Each gateway can belong to multiple route groups and can be listed multiple times within each route group.
