What are the four stages of an investigative reporting process?

What are the four stages of an investigative reporting process?
A . Initial report Progress report (within 30 days of initial report) Special report Final report
B. Initial report Progress report (within 20 days of initial report) Special report Final report
C. Initial report Progress report (within 40 days of initial report) Special report Final report
D. Initial report Progress report (within 50 days of initial report) Special report Final report

Answer: A