A situation wherein older women assume that they will outlive their spouses, and that they are better prepared for widowhood is called a normative event. Therefore, the option C holds true.
A normative event can be referred to or considered as a type of event wherein there is a higher sense of similarity in the society in the essence of duration and time periods being equal for a substantial part of the people that are a part of the society's cultures. It is usually found as a common characteristic for different age groups in the society.
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