The national press covered the secret cemetery at Nickel Academy after the Miami newspaper published the initial story, reflecting real events from the Dozier School for Boys in Florida.
The option (D) is correct.
The national press picked up the story about the secret cemetery at Nickel Academy after a newspaper from Miami published a story about it first. This is depicted in Colson Whitehead's novel 'The Nickel Boys', which is a work of fiction but draws on the actual history of the Dozier School for Boys in Florida.
The discovery of unmarked graves at this reform school led to investigations that received national attention, with the story gaining further exposure after coverage by a Miami newspaper.