A cloud service provider commonly charges clients based on compute and storage resource use. A DBA must be able to manage the database in a way as to not incur more cost than needed. How can a DBA manage the database in the cloud so that only the required amount of cloud resources is charged?

a$.$ Ensure the databases are designed for maximum redundancy.

b$.$ Ensure the virtual private network is redundant.

c$.$ Ensure the on$-$premises network is on a fiber optic network.

d$.$ Ensure database coding is efficient.