A company wishes to move all of its services and applications to a cloud provider but wants to maintain full control of the deployment, access, and provisions of its services to its users. Which of the following BEST represents the required cloud deployment model?

a. SaaS
b. laaS
c. Maas
d. Hybrid
e. Private

Infrastructure as a Service is a cloud infrastructure service or platform which provides with the computing resources like servers, storage services, backup service and networking services.

These services are provided to the organizations by cloud service providers to fulfill their business and resources requirements and the users have to purchase these services.
These resources and services are provided from the data centers of the cloud service providers.
It is beneficial to utilize these virtual services from a third party provider than to buy the hardware equipment and the consumers can use these services as per their needs and are charged accordingly instead of purchasing their own hardware which often gets difficult to maintain.
These services also provide and manage the operating systems, the applications and provides with the backup services, internet connection, security such as firewall and access controls and manage storage such as hard drives. Users can install and run any applications.
Iaas offers scalability as it can add resources and services with the growing requirements of the users.