The phrase "I too have planted marigolds" in paragraph 64 suggests that the narrator is reflecting on her own experiences and emotions, particularly in relation to the themes of growth, hardship, and perhaps the desire for beauty amidst struggles. The most fitting interpretation would be:
a. She has experienced loss and hardship in her own life.
This interpretation aligns with the metaphor of planting marigolds as a symbol of resilience and the ability to find beauty in difficult circumstances.