The theme that best expresses the content of the excerpt from Susan Glaspell's play is C: the struggle to survive.
The dialogue between Allie Mayo and Mrs. Patrick reflects their differing views on life, nature, and the human condition, with a focus on their fight against the inevitability of death and loss. Allie emphasizes the bravery of life and the natural world, while Mrs. Patrick expresses despair and a desire to bury her pain and memories. Their conversation ultimately highlights the struggle for life and meaning in the face of adversity.