Answer:
Even all the options are valid techniques or activities to keep the classroom properly managed, the option "B" is the most effective ice breaker for a first day of class and a good activity to know your students.
Explanation:
Classroom management is vital to any person who is dedicated to teaching and learning industry, even all the options are valid, they can be applied using certain schedule or program through the first day of class and the first week. The rest of the options can send the wrong message or can set up an unconfortable environment during the first week if they are not applied with a proper timing.
