What was the definition of climate change that Thunberg heard?

Which of these sentences is the correct one?

Chan was leading a group discussion in his university. he discovered that a few participants were dominating the discussion and not letting others speak. what should chan do in such a situation a. chan should allow participants to speak until they are finished b. chan should adjourn the discussion and recommence at a later point c.chan should bar the dominant participants have the freedom to share their opinion d.chan should ensure that all participants have the freedom to share their opinion e.chan should restructure the group so that the dominant participants are isolated

Can someone me with an english language arts assignment? i need someone who's an expert or good at english language ! i need correct answers only !