The crypto key generates RSA command is something that will be dependent on the IP domain name commands and the hostname. The crypto command can be used in order to generate a key pair which will have a private and public RSA key.
Based on the given choices, the right answer to this question is C because you can get a key pair whenever this command is used. There are some new programmers who may not understand this immediately because there are various things to be considered but the more that this is done, the easier this will be to understand.