As a TestKing trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?（）

A.TestKSwitch(config)# ip route-default 192.168.1.115

B.TestKSwitch(config)# ip default-gateway 192.168.1.115

C.TestKSwitch(config)# ip route 192.168.1.115 0.0.0.0

D.TestKSwitch(config)# ip default-network 192.168.1.115