Without the word "subnets", only the classfull networks will be redistributed

Router> enable Router# configure terminal Router(config)# router ospf <process-id> Router(config-router)# redistribute static SUBNETS Use the "redistribute" command to redistribute the static route into OSPF. Specify the source of the static route and any necessary parameters.

the given answer is correct: The command to distribute static route via OSPF in Cisco IOS Router is “redistribute static subnets” https://www.mustbegeek.com/distribute-static-route-via-ospf-in-cisco-ios-router/

I tested it in lab without the subnet keyword and without route-map permit 20, the static route got redistributed !!!!so i checked the configuration (show run | sec router ospf) and it turns out that the subnet key word was automatically there

D is correct. https://community.cisco.com/t5/switching/redistribute-static-subnet-to-ospf/td-p/1281958

answer is correct: https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/2-2-2/user_guide/b_cisco_dna_center_ug_2_2_2/b_cisco_dna_center_ug_2_2_2_chapter_0111.html

D is correct

The correct answer is D Router(config-router)#redistribute sta Router(config-router)#redistribute static ? metric Metric for redistributed routes metric-type OSPF/IS-IS exterior metric type for redistributed routes nssa-only Limit redistributed routes to NSSA areas route-map Route map reference subnets Consider subnets for redistribution into OSPF tag Set tag for routes redistributed into OSPF <cr>

route-map has a very specific match condition...which is the prefix-list...that is the ONLY thing matched and therefore redistributed. If you want to allow anything else you have to write a condition for it...in this case A is correct.

i don't know why? In lab. it is same result without subnets keyword. all subnets are redistributed whatever classful or not. Is that different in OS version ?