How is WINWIN Spiral Model different from Spiral Model ?

A. It defines tasks required to define resources, timelines, and other project related information
B. It defines a set of negotiation activities at the beginning of each pass around the spiral
C. It defines tasks required to assess both technical and management risks
D. It defines tasks required to construct, test, install, and provide user support

Explanation: Except option “b” all other tasks/activities are present in Spiral Model as well.