Final answer:
The specific quote about Clare dying is not found in the provided excerpts; therefore without additional context, it is not possible to accurately determine who said it.
Step-by-step explanation:
The quote "But of all the things that could happen, that was the one she did not expect. Clare should die!" does not precisely match any of the provided excerpts, suggesting that the line may come from a different part of the work or could be from an alternate source.
However, the name Clare is mentioned in several segments, indicating that the character is from a work of literary fiction with multiple characters engaged in complex emotional and interpersonal dynamics.
The provided excerpts span various subjects including motherhood, war, societal expectations, and personal change, showcasing characters in turmoil or facing significant emotional challenges.
Without additional information or context, identifying the precise speaker of the line in question is challenging.