Using Mgmt_cli, What Is the Correct Syntax to Import a Host

Using mgmt_cli, what is the correct syntax to import a host object called Server_1 from the CLI?

A) mgmt_cli add-host "Server_1" ip_address "10.15.123.10" --format txt
B) mgmt_cli add host name "Server_1" ip_address "10.15.123.10" --format json
C) mgmt_cli add object-host "Server_1" ip_address "10.15.123.10" --format json
D) mgmt_cli add object "Server_1" ip_address "10.15.123.10" --format json