No improvement to this sentence is necessary. It makes perfect sense on its own and sounds right. "Either" always takes an "or" else the word wouldn't make sense, as it's meant to contrast binary options.
eg.
I'm either going to eat food or drink water.
Answer:
She
Explanation:
She is the best and most accurate pro noun to place there.
Answer:
it is the library, which IS essential to me
The best sentence which explains Dante's use of imagery is that, Dante grieves and cries and this suggests that, Dante is not a hero in this traditional Roman and Greek sense.
Dante is a short name of Durante degli Alighieri. He was a poet and his most poets were written in Latin and only the educated people could access it.
He was used as an instrument by Italy to establish literature.
Answer: C. Irrelevant evidence
Explanation: