please answer carefully other wise I will give downvote

Which of the following statements about brain storming rules or guidelines is not correct 1. piggybacking or building on ideas is encouraged 2. Dont be afraid of to state your opposition clearly when you hear a bad idea 3. Non-evaluvation There is no criticism,evaluation, judgment,or defense of ideas 4.At the beggining focus on quantity of ideas not the quality of ideas could you please help with this