Answer:
"And thanks to my first story, I’d already met most of the school administrators in person and had the beginnings of an actual list of sources for future stories."
Step-by-step explanation:
This is the quotation from the passage that best supports that this statement is the central idea. In this quotation, we learn that effective journalists build strong contacts in the community. The quotation supports this idea, as it tells us that this journalist was able to build successful relationships with people in the community after his first story.