Answer: Ask a member of the Enterprise Admins group to authorize the server.
Explanation:
From the information given, we are informed that Rachel installed a new server running Windows Server 2016 on the new subnet and configure it as a DHCP server but then realizes that the DHCP server service has started, but that the server does not respond to DHCP lease requests.
In this case, the reason for this can be attributed to the fact that the server hasn't been authorized, therefore, she can ask a member of the Enterprise Admins group to authorize the server.
I’m pretty sure answer is B let me know if I’m wrong
Answer: A- Public Key Encryption
Explanation: The Public key Encryption is used prevalently on the web, it allows for secure messages to be sent between parties without having to agree on, or share, a secret key. It uses an asymmetric encryption scheme in which the encryption key is made public, but the decryption key is kept private.
Cleaning up a system helps clear up the space on the drives. It may also clear up processor usage, ram usage if you uninstall programs that automatically started when the system booted. You may also delete some unwanted programs in the process.