Answer:
A
Explanation:
To mourn is to feel or show deep sorrow or regret.
In formal writing and communication, the sentence "Mom said she thought Maria had been treated wrongly and that she should stick up for herself." is more appropriate. Although wrong and wrongly are both adverbs, some writers consider using adverbial "wrong" as incorrect, so you might want to play it safe and use "wrongly" instead.
I believe the answer is A., though it's been a while since I read the story.
#2 and #4 for sure, I'm not sure about the others. Probably not the first one.
It is a fragment because it doesn't make sense on its en. Its a subordinate clause.