Which Statement Is True of Isaksen and Tidd's Review of Change

Which statement is true of Isaksen and Tidd's review of change methods:

A) Many of the methods they reviewed were poorly researched.
B) Most methods were intended for use with one, very specific kind of task.
C) They identified more than 30 distinct methods that varied widely in breadth and purpose.
D) Most methods were relevant for complex, open-ended tasks that called for novel responses or solutions.