A company plans to migrate to Microsoft 365. Employees must be able to collaborate by using Microsoft Yammer, SharePoint Online, StaffHub, and Teams. You must minimize costs. You need to subscribe…

E3 includes all the required services but is a premium enterprise plan with significantly higher per-user costs, violating the requirement to minimize costs.

ProPlus is a desktop application suite focused on Office productivity apps and does not include services like Yammer, SharePoint Online, Teams, or StaffHub as standalone offerings.

E1 includes the required services and is cheaper than E3, but it is still more expensive than F1, making it not the minimum-cost option that satisfies the requirements.

Office 365 Personal is a consumer-focused subscription designed for individual home use and does not include enterprise collaboration services like Yammer, StaffHub, or Teams for organizational use.

Office 365 F1 (formerly known as the Firstline Worker plan) is the lowest-cost subscription tier that includes access to Yammer, SharePoint Online, Microsoft Teams, and StaffHub, making it the cost-minimizing choice. It is specifically designed for frontline/firstline workers and provides web and mobile access to these collaboration tools without requiring full desktop Office app licenses.