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A. Delphi.
B. Earned value.
C. Expert interviews.
D. Cost benefit analysis.
Delphi method is the best
Option-A -Delphi....................................................
Delphi technique is most commonly used to obtain expert opinion
Option (D). Cost benefit analysis
In my opinion -- A. Delphi. -----------------------------------
expert interviews -option c
Thanks for the interview.
It is C - Expert interviews.