A business should choose the platform as a service (PaaS) cloud model when: a. it designs its own applications but doesn't customize the operating system b. it doesn't need any operating system c. it doesn't design its own applications and doesn't customize the operating system d. it designs its own applications and customizes the operating system e. it doesn't design its own applications but customizes the operating syste

a. it designs its own applications but doesn't customize the operating system.

Explanation:

Cloud computing can be defined as a type of computing that requires shared computing resources such as cloud storage (data storage), servers, computer power, and software over the internet rather than local servers and hard drives.

Generally, cloud computing offers individuals and businesses a fast, effective and efficient way of providing services.

Cloud computing comprises of three (3) service models and these are;

1. Infrastructure as a Service (IaaS).

2. Software as a Service (SaaS).

3. Platform as a Service (PaaS).

Platform as a Service (PaaS) refers to a type of cloud computing model in which a service provider makes available a platform that allow users (software developers) to build code (develop), run, store information in a database and manage applications over the internet.

The main purpose of a Platform as a Service (PaaS) is to provide an enabling environment for software developers to code without having to build and maintain complex infrastructure needed for the development, storage and launching of their software applications.

Simply stated, PaaS makes provision for all of the software and hardware tools required for all the stages associated with application development over the internet (web browser).

Some of the advantages of Platform as a Service (PaaS) is that, it avails software developers with enough convenience as well as simplicity, service availability, ease of licensing and reduced costs for the development of software applications.

Basically, platform as a Service (PaaS) providers (vendors) usually provide their clients (software developers) with server and data storage, operating system, data center, networking resources, etc., while the software developers design, deploy and manage their software applications.

Hence, a business should choose the platform as a service (PaaS) cloud model when it designs its own applications but doesn't customize the operating system.