Directions (1-6): In the following questions, a sentence is divided into four parts. Choose the part of the sentence which may contain a grammatical error in it. If all the parts of the sentence are grammatically correct and contextually meaningful, choose option “no error” as your answer choice.

Nancy danced (A)/ across the stage (B)/ graceful, captivating the (C)/ audience with her elegant performance. (D)

The correct option is C.

Let us analyze the sentence step-by-step to identify the grammatical error:
1. Part (A): "Nancy danced" - This part is grammatically correct. "Nancy" is the singular subject, and "danced" is the past tense verb.
2. Part (B): "across the stage" - This is a prepositional phrase acting as an adverbial modifier indicating the direction/location of the action. It is grammatically correct.
3. Part (C): "graceful, captivating the" - In this part, the word "graceful" is an adjective. However, it is intended to modify the verb "danced" from part (A) by describing how the action was performed. To modify a verb, we must use an adverb instead of an adjective. Therefore, "graceful" must be replaced with the adverb "gracefully".
4. Part (D): "audience with her elegant performance." - This part is grammatically correct and completes the thought contextually.

Thus, the grammatical error lies in part (C), where the adjective "graceful" should be replaced with the adverb "gracefully" to correctly modify the action of dancing.