A customer wants to deploy a customized e-commerce web application using multiple virtual machines, block storage, databases, load balancer and a web application firewall. What cloud model can be used to host this application? 

Answer options:

A. Infrastructure as a Service (IaaS)
B. Software as a Service (SaaS)
C. Platform as a Service (PaaS)
D. Anything as a Service (XaaS)

A

Reference: https://searchcloudcomputing.techtarget.com/definition/Infrastructure-as-a-Service-IaaS