Prose must explain complete ideas because it enables the reader to comprehend the authors vision, and thought process as well as the emotional state that the author wants the character(s) to have. This is in the case of fiction.
When it comes to nonfiction it enables the reader to understand the material or the argument presented in front of him or her. Furthermore, arguments when presented with evidence which incorporates complete ideas and knowledge of the topic in question. It gives the reader a proper explanation and answers to the questions that may arise whilst reading the informative material at hand.
The best answer to complete this sentence would be the third option aka C) Theme of equal rights.
Answer:

Explanation:
All you need to do is memorize the structures first.
For simple past :
- Active voice : sub + v² + obj
- Passive voice : obj + was / were + v³ + by + sub
✧ Hope I helped ! ✧
♪ Have a wonderful day / night ! ♡
Let me know if you have any questions regarding my answer ツ
!! ✎
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
The person in this photo is moving out of the current place their living
This person is moving away from where they are currently living.
This person hoards a lot of unneeded items in their home.
This person is getting rid of a lot of stuff.
:)