A disadvantage of the Incremental model is that:

A disadvantage of the Incremental model is that:

A.clients are not billed until the last build is completed.

B.it is not easy to accommodate changes that occur due to external (competitive, social and regulatory) forces.

C.the model can easily degenerate into the 'build-and-fix' approach.

D.There are no advantages of the incremental model - the approach has largely been discredited.

E.All of these are disadvantages of the incremental model.

正确答案是C