At the start of the spring semester, Marie decides that she will focus more on her physical health. Her solution is to start jogging, with a goal of running in the annual Memorial Day 10K. After training for several weeks, Marie completed the race but needed to walk for the last mile. What would be the next step for her as an effective problem-solving strategy? a. Choose a new problem to work on. b. Celebrate her success. c. Continue to do what she has been doing. d. Look back to see if the original problem has been solved.