Which of the Following Situations Demonstrates Effectiveness but Not Efficiency

Multiple Choice

Which of the following situations demonstrates effectiveness but not efficiency?

A) Workers at MNS worked overtime for two weeks,but were unable to achieve their target production.
B) Managers at MNS aimed to complete a particular project by August,but only completed it in September.
C) The manager told Stella to do a report,even though Ray was better qualified for the task.However,Stella managed it successfully.
D) Following a number of layoffs,Gianna's team was very demotivated and hence the performance of the department suffered.
E) MNS aimed to complete construction of the new plant in two weeks,but a workers' strike delayed construction.