Community building on LinkedIn by organizations with LinkedIn Pages can grouped into three main categories:

The correct answer, "Establishing an employee network, growing followers of your LinkedIn Page, and building active LinkedIn Groups," represents the three core pillars of community building for organizations on LinkedIn. An employee network amplifies reach and credibility, growing Page followers expands your direct audience, and active LinkedIn Groups foster deeper engagement around specific topics. The other options are incorrect because they either include features not primarily focused on community building (like targeted advertising for likes or publishing blog articles outside of LinkedIn's native article feature), or they mention features that are less central to an organization's overall community strategy (such as coordinating in-person events with Invites as a primary community-building category, or using the 'Threads' feature in DMs as a main pillar).