Assign a particular group to respond to the topic.
You can edit other settings for the Topic by clicking on the other tabs next to the Properties tab.
Restrictions: Allows you to establish Release Conditions for the Topic. That is, a student must complete a task in D2L, such as completing a quiz, before having access to the Topic. Under the Group and Section Restrictions you can also decide who in your class has access to this Topic.
Assessment: Allows you to associate the discussion Topic with a Grade Item (must be already created), assign a score, and add rubrics. You can also assess individual posts in the Topic by selecting a calculation method from the dropdown list.
Objectives: Allows you to associate learning objectives with the topic.
Save all your settings.