Final answer:
Unrealistic expectations is not a cause of project failure.
Step-by-step explanation:
The given options are:
(1) Inadequate user involvement
(2) Complete, clear requirements
(3) Unrealistic expectations
(4) Inadequate planning
The question is asking which of these options is NOT a cause of project failure.
To identify the correct answer, we need to consider which option is actually a cause of project failure. Inadequate user involvement, complete, clear requirements, and inadequate planning are all factors that can contribute to project failure.
However, unrealistic expectations are not listed as a cause of project failure, so the correct answer is (3) Unrealistic expectations.