Why Is It a Challenging Task to Calculate a Project's

Multiple Choice

Why is it a challenging task to calculate a project's return on investment (ROI) ?

A) It involves differentiating between the costs and savings, which are often hard to distinguish.
B) Estimating ROI for projects that involve information systems involves specialized accounting knowledge.
C) It is difficult to estimate ROI for projects where costs rise unexpectedly and revenue increases are hard to predict.
D) When project costs remain stable throughout the duration of the project, they become hard to keep track of.