Which of the following is the correct security measure at the intersection of Availability $-$ Storage $-$ Awareness, Training, Education?

a$)$ Firewall rule that drops sessions that fail to complete the TCP three$-$wayhandshake

b$)$ Handbook detailing when and where users can access data on cloud storage system

c$)$ Configuration requirements that limit database access to authorized users

d$)$ Corporate procedures that establish user access rules for files stored in the cloud