Fill in the blank with the most appropriate preposition:
The archaeologist stumbled ____ an ancient manuscript buried beneath the ruins.
Show answer & explanation
Correct answer: C
Explanation
The phrase 'stumbled upon' is a common expression used to describe finding something accidentally or unexpectedly.
Among the given options, 'upon' is the most appropriate preposition to complete the sentence meaningfully.
Other options like 'across,' 'into,' or 'over' are grammatically correct but do not convey the same sense of accidental discovery as 'upon.'