The article states:
The boy was six when his dad took him to the shoe store. But the clerk there wouldn't help them. Why? Because of the color of their skin. There were rules against treating Black people as equals.
The author uses this passage mostly to __________.
A. show that segregation laws were unfair and unjust
B. explain how nonviolent protest works
C. explain that the shoe clerk treated all customers unfairly
D. show why people refused to ride city buses