Answer:
The effect of Audrey's parents suing the city to integrate public parks was C. The city closed all of its parks.
Explanation:
The sentence directly after where it states that Audrey's parents sued the city states that the city closed all of its parks. Therefore, the cause is Audrey's parents suing the city, and the effect is the city closed all of its parks.
You should include opinions that contradict your own, and attempt to say why those opinions are invalid based on your own argument.
Written prose tends to follow a specific rythm and rhyme scheme. Also, written prose usually has sentence structure that differs from casual speech in order to fit that rythm and rhyme.
It keeps them on edge, and makes them cave into whatever you are persuading them to do/say/buy etc.