That's not a full sentence. "the glacier" is a phrase, not a sentence.
The answer is the last one because infinitive phrases need a to- with a verb to it like to visit. to was used and visit is a verb because you can visit things like the store, For Example: we went outside to visit the store.
Im pretty sure that it’s B. Because in academic writing you should give attention to all sides of the issue.
Answer:
I put B. The speaker compares his study to a miserable dungeon....
Explanation:
The right answer never came out tho So it’s not fs
