Final answer:
Follow-up in problem-solving refers to monitoring and adjusting the implemented solutions as needed to ensure effective resolution of the problem. Option d is the correct answer.
Step-by-step explanation:
In the context of problem-solving, "follow-up" refers to addressing solutions that may need to be changed after they have been implemented.
This is an important part of the problem-solving process, as it involves monitoring the outcomes of the solution to determine if the desired results were achieved.
During follow-up, any issues with the current solution are identified and adjustments are made accordingly to ensure that the problem is effectively resolved. Follow-up ensures that the solution remains effective over time and addresses any new challenges that may arise.