What is the merge code needed for this Integration Procedure structure to pass a CaseData node from the HTTP Action's output to the DataRaptor Transform Action?

What is the merge code needed for this Integration Procedure structure to pass a CaseData node from the HTTP Action’s output to the DataRaptor Transform Action?

Refer to the exhibit below .

What is the merge code needed for this Integration Procedure structure to pass a CaseData node from the HTTP Action’s output to the DataRaptor Transform Action?
A . %HTTPGetDetails:CaseData%
B . %DRXformCaseData: CaseData%
C . {{ HTTPGetCaseDetails:CaseData}}
D . {{CaseData}}

Answer: B