Final answer:
The correct answer is option c. Integrity vs. despair.
Step-by-step explanation:
In the context of the question, Gretta is showcasing a key aspect of the developmental stage in late adulthood, as described by Erik Erikson, known as integrity vs. despair. This stage involves reflecting on one's life and accomplishments and moving toward a sense of fulfillment and wisdom, or alternatively, facing regret and dissatisfaction. In Gretta's case, her contribution to the community arts program is an expression of generativity, where she finds meaning in her later years through activities that benefit others, thus leaning towards ego integrity.
Her actions highlight a resolution of Erikson's challenge for older individuals, which is overcoming despair to achieve a sense of integrity. This late stage of psychosocial development is about assessing and making sense of life and the meaning of one's contributions. Gretta, by actively contributing to something that will outlast her, is exemplifying a successful negotiation of this stage, embracing her life's experiences with a sense of completeness and closure.