A prepositional phrase consists of the preposition and its complement. From the given sentences above, the sentence in which the prepositional phrase best modifies the verb saw is option C. Through the window, I saw the bird flying. The prepositional phrase in this sentence is "through the window".
I believe to is your answer.
Hope this helps!
Stay smart,
~{Dunsforhands}
We were shocked at her absence from the ceremony is correct, so the first one
D
Emphasis is right because it is to show importance of something that occurred
