Locate the participial phrase and the word it modifies. waiting in the cafeteria line, the girls talked about their history assignment.
participial phrase:
modified:

The participial phrase is "Waiting in the cafeteria line" and the modified word is the noun "girls".

Explanation: A participial phrase is a group of words that is introduced by a present participle or a past participle. While present participles end in -ing, past participles can end in -ed, -en, -d, -t or -n. Moreover, in order to express a full thought, participial phrases modify another word, which is generally a noun. In that way, participial phrases function as adjectives. In the case of this sentence, the participial phrase "Waiting in the cafeteria line" begins with a present participle ("waiting") and it is modifying the noun "girls" since the sentence can be rephrased into  "The girls waiting in the cafeteria line talked about their history assignment".  

the answer is c the speaker emotions

c. with one finger is the answer