Option D is the recommended method to configure the SAN boot when the storage system maps the source WWPN to a unique LUN. This method creates a SAN boot policy in which every initiator is mapped to a different target LUN, which ensures that each server boots from its own LUN and avoids any conflicts or errors. The other options are either incorrect or incomplete for the task. References:
* Cisco UCS Manager GUI Configuration Guide, Release 4.0 - Configuring SAN Boot [Cisco UCS Manager], Configuring SAN Boot, Configuring SAN Boot
* Cisco UCS Manager CLI Configuration Guide, Release 4.0 - Configuring SAN Boot [Cisco UCS Manager], Configuring SAN Boot, Configuring SAN Boot

To remove all OSPF configuration, the most effective command is no feature ospf. This disables the OSPF feature entirely on the Nexus switch, automatically removing all related router processes and interface configurations. The Python code OSPF_Conf.write('no feature ospf\n')writes this line into the OSPF.txt file, which can then be applied to the switch to remove OSPF.

You can use the show install impact epld bootflash: command to determine whether the EPLDs can be upgraded for all the modules or for specific modules on a switch. This command indicates the current EPLD images, new EPLD images, and whether the upgrades would be disruptive to switch operations. https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/6-x/epld/n9k-epld-rn-61.html