Final answer:
The credibility of an author's perspective on manifest destiny significantly depends on the context and their background. Understanding the author's point of view and potential biases is crucial when analyzing historical narratives about manifest destiny.
Step-by-step explanation:
Option c) Depends on the context is the most suitable answer to whether the author's point of view affects the credibility and validity of the manifest destiny. The author's perspective can hugely influence how manifest destiny is represented and understood. For instance, an exposition from an expansionist American in the 19th century might offer a very positive view of manifest destiny as a divine right and justification for territorial expansion. Conversely, a Native American's viewpoint from the same period would likely cast manifest destiny in a harsh, unjust light.
In assessing historical documents or opinions on manifest destiny, considering who is telling the story is crucial, as their background, experiences, and intentions can color the narrative. This could affect the credibility of the source, especially if the author omits relevant points, or if their logic is biased or lacks substance. Moreover, the complexity of personal belief systems often influences one's acceptance of different positions on historical concepts like manifest destiny. Thus, reflecting critically on various perspectives is essential for understanding the full scope and impact of this doctrine.