What is the marge code needed for this integration procedure structure to pass a CaseNumber node from the DRReadCase DataRaptor Extract Action to the HTTP Action’s HTTP URL?

Refer to the exhibit below .

What is the marge code needed for this integration procedure structure to pass a CaseNumber node from the DRReadCase DataRaptor Extract Action to the HTTP Action’s HTTP URL?
A . %DRReadCase: CaseNumber%
B . ((DRRCase, CaseNumber))
C . MTTOPDetCaseDetail: CaseNumber%
D . ((CaseNumber))

Answer: A