Answer:
D. She believes the garden will last many years
Explanation:
Grandma Elise believes that the garden will bring joy to the others in the future because she believes that the garden will last many years.
She is of the opinion that the garden will be a source of joy to others as it was a source of joy to her even as she believes that the garden will last for many years.
Lively is to inactive as worthless is to worthwhile.
Both sought after by other people