Final answer:
The quotes showing high racial and cultural tensions are 'There were riots, but these were outside the city, where people of another color were quartered' and 'The sun rose over a divided land, where walls were erected not just in streets but also in hearts'.
Step-by-step explanation:
The two quotes from the passage that best support the inference that the story takes place during a time of high racial and cultural tensions are:
- "There were riots, but these were outside the city, where people of another color were quartered" (paragraph 13).
- "The sun rose over a divided land, where walls were erected not just in streets but also in hearts".
These quotes suggest a clear division in society, marked by physical and metaphorical boundaries, and the occurrence of riots based on racial lines, all of which indicate an environment fraught with racial conflict.