Which exhibit displays a valid JSON file?

A.	{ "hostname": "edge_router_1" "interfaces": { "GigabitEthernet1/1" "GigabitEthernet1/2" "GigabitEthernet1/3" } }
B.	{ "hostname": "edge_router_1", "interfaces": { "GigabitEthernet1/1", "GigabitEthernet1/2", "GigabitEthernet1/3", }, }
C.	{ "hostname": "edge_router_1" "interfaces": [ "GigabitEthernet1/1" "GigabitEthernet1/2" "GigabitEthernet1/3" ] }
D.	{ "hostname": "edge_router_1", "interfaces": [ "GigabitEthernet1/1", "GigabitEthernet1/2", "GigabitEthernet1/3" ] }