MrStone's Students Have Been Completely Engrossed in a Physics Experiment

Multiple Choice

Mr.Stone's students have been completely engrossed in a physics experiment.At the end of the experiment,all of his students scored 100% on the follow-up quiz.This is one of Mr.Stone's most effective class sessions.This illustrates:

A) engaged time or time on task.
B) access to learning.
C) academic learning time.
D) instructional time.