Final answer:
Social support is not an important determinant of the goal-acceptance process.
Step-by-step explanation:
The important determinants of the goal-acceptance process are factors that influence whether an individual accepts or rejects a goal. While all options listed in the question are important determinants, the correct answer is d. Social support. The proximity of the goal, relevance to personal values, and perceived attainability all play significant roles in the goal-acceptance process.