Final answer:
Option (D), Atticus's decision to defend Tom Robinson in the excerpt reflects his strong morality and principles, rather than stubbornness, guilt, or hopelessness.
Step-by-step explanation:
The excerpt above, describing why Atticus is defending Tom Robinson, could be best described as an example of Atticus’s morality. This passage illustrates Atticus's strong ethical principles and his commitment to upholding what is right and just, even in the face of societal pressure. He feels that failing to defend Tom Robinson would compromise his own integrity and ability to serve as a moral example for his children, his town, and within his professional responsibilities.