Alright, so amongst starters, you have a few you can use to show you'll have evidence:
According to text
According to the passage
According to the information provided
As the information shows
As the text mentioned, (include direct quote here)
Based on the information in the passage/text, (include reasoning here)
Etc. There are quite a few options, really, these are just a few. Based on whatever you are providing the information ON, the words information, text, and passage can be changed to suit your needs, such as article, newspaper, website, etc.
C. realism is the answer because it follows a realistic timeline
The period in which they lived and the style of poetry they wrote
I think deleting first person will make it sound more professional
