如果要将目标网络为202.117.112.0/24的分组经102.217.115.1接口发出，需要增加一条静态路由，正确的命令是（ ）
Aroute add 202.117.112.0 255.255.255.0 102.217.115.1
Broute add 202.117.112.0 0.0.0.255 102.217.115.1
Cadd route 202.117.112.0 255.255.255.0 102.217.115.1
Dadd route 202.117.112.0 0.0.0.255 102.217.115.1