In OSPF, the router with the highest priority on a network becomes the Designated Router (DR), responsible for generating LSAs for the network. By default, all Cisco routers have an OSPF priority of 1. To ensure that SW2 becomes the DR and controls the LSA floods, its priority needs to be the highest in the OSPFv2 area. The command in option A sets the OSPF priority to the maximum value of 255, which will make SW2 the most likely candidate to be elected as the DR, provided that no other router has a higher priority or a higher router ID if priorities are equal. References := This explanation is based on the OSPF election process as described in Cisco's OSPF design guide and the Implementing and Operating Cisco Data Center Core Technologies (DCCOR) course materials. For detailed information, please refer to these resources.