Final answer:
The stories "Medicine Bag" and "Apache Girl" discuss the customs within American Indian society.
Step-by-step explanation:
The topic presented in the stories "Medicine Bag" and "Apache Girl" is A. Customs within American Indian society. Both stories explore the cultural practices, traditions, and customs of Native American communities. "Medicine Bag" focuses on the significance of passing down a family heirloom and the value of cultural heritage, while "Apache Girl" explores the Apache coming-of-age ceremony and the importance of embracing one's cultural identity.