Which of These Is Closest to What David Gordon Means

Which of these is closest to what David Gordon means when he says journalists need more transparency in their use of confidential sources?

A) Journalists should be more transparent by naming their confidential sources when need be
B) Journalists should be more transparent by telling their audiences why they needed to use a confidential source for a story
C) Journalists should be more transparent by telling sources they might not be able to safeguard their identity in court
D) Reporters should be more transparent by consulting with their editors before granting confidentiality to sources