GuardIN is an IT security firm. It deals with highly secure…

 GuardIN is an IT security firm. It deals with highly secure data for various software and e-commerce agreements, trademark, and patent licenses. GuardIN needs a cloud computing option that would allow it to purchase and maintain the software and infrastructure itself. The cloud also needs to be designed in such a way that all users of the organization can access it without any lag. Which cloud computing option would be most suitable for GuardIN?