A teacher divides students in small groups and designates specific tasks for each group. While students are working on their tasks, the teacher will :

Correct option is D

move from group to group and address their doubts.
When a teacher divides students into small groups and assigns specific tasks to each group, the most effective use of the teacher's time during this period is to move from group to group and address their doubts. This allows the teacher to provide individualized attention and support to each group, ensuring that students are understanding the material and progressing on their tasks. It also allows the teacher to identify any areas where students may be struggling and provide additional guidance as needed.