Final answer:
Kurt Vonnegut's delay in writing about his experiences in Dresden is attributed to the psychological effects of PTSD and the way in which literature is shaped by historical context.
Step-by-step explanation:
Kurt Vonnegut struggled for many years to write about his experiences in Dresden due to the complicated nature of processing traumatic events and the influence of historical context on literature. The psychological impact of traumatic experiences like those Vonnegut endured during the bombing of Dresden can create barriers to articulating and sharing such events.
This psychological phenomenon is often referred to as Post-Traumatic Stress Disorder (PTSD) which can severely hinder a person's ability to recount their traumas. Furthermore, the way history informs literature indicates that an author's work is invariably shaped by the time of its composition.
This suggests that societal, historical, and personal readiness, as well as the prevailing cultural atmosphere, can greatly affect when and how authors confront their experiences in their work.
Therefore answer is C. Psychology.