A few of these answers could work but I think A or C would be most fitting!
Answer:
D. an encyclopedia of plant images
Explanation:
Because hes reading about vegetation there were things he doesnt understand so the best answer is D.
Can i get brain please (Kindness never hurts)
The sentence which is the most objective is A. My mother taught Italian lessons at the community center.
It is a fact, therefore it is objective. The other sentences are somebody's opinions - stupid sisters, crazy Greek family, a real pain - these words show that it is someone's opinion, which is subjective, not objective.
You could look at some of poes poems to look for advice