Answer:
d). Fixed-price contracts between customers and the project organization
Step-by-step explanation:
APM or Agile Project Management is an iterative outline to the planning and guiding of project processes. It is often completed in small stages or sections. These small sections are called iterations.
An organization's fixed-price contract provides a price which can not be adjusted on the basis of contractor's cost experience in doing the contract.
Thus in agile project management it is very difficult for a fixed price contract because the agile project, the work is approach section by section and thus it is difficult for the contractor as the price of the resources increases with time.
Hence the answer is (d).