When Betsy informed her supervisor that the furniture assemblers at their manufacturing plant were using 20 percent more raw materials in the current month when compared to the preceding months, she was involved in the management function of: .
A. planning.
B. structuring.
C. staffing.
D. controlling.
E. benchmarking.

D. controlling.

Explanation:

Controlling -

It refers to the activity , which helps to avoid any deviation from the pre - defined plans , is referred to as controlling .

It helps to maintain the budget and planning , so that nothing goes out of plan .

The function involves comparing the work performance , measuring performance any relevant corrections etc.

Hence , from the given scenario of the question ,

The correct answer is d.  controlling .