Which of the following is not an advantage associated with database$-$as$-$a$-$service $($DaaS$)?$

a$.$ It eliminates the installation, maintenance, and monitoring of in$-$house databases.

b$.$ It reduces hardware, software, and staffing related costs.

c$.$ The service provider can allocate more or less database storage capacity based on an individual customer's changing needs.

d$.$ The customer has complete responsibility for database security access and database backup.