A Chief Information Officer (CIO) wants to implement a cloud solution that will satisfy the following requirements:
– Support all phases of the SDLC.
– Use tailored website portal software.
– Allow the company to build and use its own gateway software.
– Utilize its own data management platform.
– Continue using agent-based security tools.
Which of the following cloud-computing models should the CIO implement?

A. SaaS
B. PaaS
C. MaaS
D. IaaS