Which correctly describes a cause-and-effect relationship in this excerpt? Cause: People had to walk a half mile to catch the bus. Effect: The bus company refused to extend the bus line. Cause: People had to walk across a bridge to catch the bus. Effect: Mr. Nixon protested to the bus company. Cause: The bus company refused to extend the bus line. Effect: Mr. Nixon drove his car into town. Cause: Mr. Nixon asked the bus company to make a new stop. Effect: The bus company refused to make a new stop.