In the 1950s people of color in Montgomery AL wererequired to sit in the back of

In the 1950s people of color in Montgomery AL wererequired to sit in the back of buses reserving the front of thebuses for Whites only. If buses were full they were then requiredto give up their seats to White passengers. Rosa Parks famouslyrefused to give up her seat & was arrested for that offence.This eventually resulted in changes to the law. Why did it takesuch a startling example to change the law?