At which criteria level is the most important to observe a significant change in order to conclude that a training program is effective

Level 3 evaluation

Explanation:

In simple words, Level 3 assesses the extent to which individuals' attitudes improve as a consequence of the education - in other words, if the program's information and abilities are used on the job. The learner's conduct is measured both before and after the activity at Stage 3.

Thus, from the above we can conclude that the correct answer is level 3 evaluation.

previous business sales - c.

answer; limited pay life;