A potential screen exists, but is not limited to: 

A. Player(s) on the serving waving arms, jumping, moving sideways or standing close to the server, and the ball is served over the player(s). B. Players on serving team taking action to prevent opponents from seeing path of served ball. 

3. When a group of two or more players on the serving team stand close together, and the ball is served directly over them and in a low trajectory. 

4. All are correct. - ANSWER- D. All are correct. 

During the set, the libero tracker shall: 

1. Notify the second referee if the libero does not remain out of the set for one rally between replacements, unless the libero is replacing the player in the right back position and will serve the next rally. 

2. Inform the second referee of each team's libero status at the beginning of each time-out. 

3. Notify the scorer to sound the audio device at the time the ball is contacted for the serve when there is an illegal replacement. D. All are correct. - ANSWER- D. All are correct. 

Unsporting conduct forfeit results when: 

1. A disqualified individual violates conduct rules following disqualification. 

2. Coach is disqualified and removed from premises and no other authorized school personnel is available to take the bench. 

3. Team refuses to play when directed to do so by the first referee