The correct answer is B) Geena sadly watched the rain fall.
Explanation:
A misplaced modifier occurs if the modifier of a noun (for example, an adjective) is placed away from the noun it describes, which leads to confusing sentences. In the case of the sentence "Geena watched the rain fall sadly" there is a misplaced modifier because the adverb "sadly" has been separated from the verb "watched" it modifies. Due to this, it seems it is the rain the one that falls sadly. In this context, the appropriate way to correct this mistake is to place the modifier "sadly" right before the action it modified "watches" and therefore the correct sentence is "Geena sadly watched the rain fall".