Final answer:
The correct answer is option b. For a soft-curl perm, rods should be chosen that are slightly larger than the natural curl, ensuring a soft, natural-looking outcome.
Step-by-step explanation:
When arranging the curl pattern for a soft-curl perm, one must consider the desired outcome. The choice of rod size affects the tightness of the resulting curl. For a soft and loose curl, the rods selected should be slightly larger than the natural curl.
This ensures that the perm will enhance the natural curl pattern without making it too tight or creating an entirely new pattern. The curl produced will have a softer, more natural look that should be easy to style and maintain. The goal is to provide a gentle wave or soft curl that complements the hair's natural tendencies.