Answer:
C). I gulped down my food, grabbed my bus card, and pecked my mother on the cheek as I raced out the door.
Step-by-step explanation:
'Personal narrative' as the title implies 'a narrative that relates or retells the author's own experiences intending to convey a message, lesson or merely sharing an engrossing exposure or experience. Such narratives must offer an organized and coherent meaning so the audience could relate to it more conveniently and efficiently.
In the given question, the sentence that must follow sentence 6 in order to efficiently move the plot forward is displayed through option C as it resumes the continuity of the narrative. After the mother brought breakfast for him, he 'gulped it down' and set out from home as reflected by the phrase 'grabbed .....pecked my mother....raced out the door'. Thus, option C keeps the continuity intact and hence, it is the answer.