The correct answers are:
✅ A. Creating child price lists for different regions
Parent/child price lists are often used to reuse a base (parent) price list while allowing regional variations via child price lists.
This promotes consistency while supporting localization or market-specific pricing.
✅ C. Changing the pricing of child products in bundles
A child price list allows you to override specific product prices, such as pricing for child products in bundles, without duplicating the entire price list.

❌ B. Applying rules to child price lists
Incorrect: Rules like context or advanced rules are not applied to price lists directly. They’re applied to products or pricing behavior, independent of the price list hierarchy.
❌ D. Changing the pricing of the parent product in a bundle
Incorrect: If you're changing the pricing of the parent product, you can do it in the main (parent) price list or a specific entry; a child price list is not required just for the parent product.