C. Writing the goal(s) down.
Writing the goals down is the most important goal-setting steps because know about your goal is the main thing that help a person to move forward in order to achieve its goal in life. After setting a goal, we should establish a timeline and then act on fulfilling the goal in this timeline in order to complete the task in less time. Develop an action plan is the most important step because it has the details of how you will achieve your goal.
So we can conclude that Writing the goal(s) down is the right answer.
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