(c) Achievable — 'A' in SMART stands for Achievable, meaning breaking big goals into smaller parts to make them attainable.
The passage explicitly states: "Achievable: Breaking down big goals into smaller parts will make the goal achievable." Options (a), (b), and (d) are not part of the SMART framework. Always remember the full form: Specific, Measurable, Achievable, Realistic, Time-bound.