How should the Community Cloud Consultant educate employees on how to access the Community?

Universal Containers (UC) wants Lightning Experience enabled employees who have Salesforce user licences to access a Community. The employee profiles have been added to the Community membership.

How should the Community Cloud Consultant educate employees on how to access the Community? Select one or more of the following:
A . Recommend employees use a separate username for Community access
B . Advise employees to use the "Login in as" functionality
C . Direct employees to the App Launcher
D . Direct employees to the global header

Answer: C