An IBM technician specialist has a prospective customer who is excited about eX5 and is working on configuration for a very large complex opportunity. During the engagement the customer has changed the design several times and has significantly increased the scope. The customers recently selected a Business Partner who has been involved in the last few design changes. What steps should the IBM technician specialist take to make sure the customer is satisfied with the solution？（）

A.Turn over current design to Techline to create configurations
B.Perform knowledge transfer of design requirements to Business partner then disengage
C.Work with Business Partner to engage Techline to assist with configuration and request technical and Delivery Assessment （TDA）
D.Work with business partner to engage Techline to create configurations