QUESTION $20$

$\_\_\_\_\_\_\_\_\_\_\_\_\_$ solutions provide a collection of hardware and software resources that developers can use to build and deploy applications within the cloud.

A$.$ Platform as a service $($PaaS$)$

B$.$ Infrastructure as a service $($IaaS$)$

C$.$ Identification as a service $($IDaaS$)$

D$.$ Software as a service $($SaaS$)$