Choose the disadvantage of using SSM as an elicitation technique ?

Choose the disadvantage of using SSM as an elicitation technique ?

A. It incorporates human element into design
B. SSM is in its infant stage
C. SSM is suitable for new systems
D. Standard methodologies like Role Exploration, Issue Resolution and Reorganization support SSM

Explanation: SSM is still in its infancy.It is evolving and its industrial usage is low.