A. A service principal with appropriate permissions to access the instances

B. An SSH key pair, where the private key is available on the Cloud Shell VM and the public key is in the outhorized_keys file in each of the compute instances

C. A hosts file on the Cloud Shell VM containing all of the IP addresses of the target instances

D. An Ansible agent on each target compute instance

E. A network route from the Cloud Shell VM to each of the target compute instances