Answer:
The correct answer is Measure the impact and results from all of those changes and make additional adjustments.
Explanation:
Impact evaluation measures the difference between what happened having implemented the program and what would have happened without it. Responds to the question, “How much of the observed change in the target population (if any) occurred due to the program or intervention ? ”
Rigorous research designs are required for this level of evaluation. It is the most complex and intensive type of evaluation; incorporates methods such as random selection, control and comparison groups. These methods serve to: