Answer: B) Dancers.
Explanation: In the given sentence, the word that correctly fills in the blank, must be a noun in the nominative form (not in the possessive form) because it is positioned after an article and before a verb, and also it will be the subject of the phrase (the person that performs the action of the verb). So the correct answer is the corresponding to option B, and the complete sentence would be: The dancers leapt into the air.
