$q,$ decreases social loafing and production blocking $-$problems with brainstorming$-$by $$

brainstorming; making people pool their ideas in a face$-$to$-$face meeting.

brainstorming; discouraging bad ideas in the meeting.

nominal group technique; making people speak in turns during all faceto$-$face meetings.

brainstorming; making people agree to one idea generated in a face$-$toface meeting.

nominal group technique; making people write down ideas on their own.