Nancy is engaged in the construction of three unique office buildings. Although construction sites are located in various places, she has been managing each team very efficiently to complete the work on time and within the budget. Which of the following statements describe the effort that Nancy is doing?
A. Construction of each building is an operational work because it is repetitive in nature
B. The building construction is considered neither as a project nor as an operational work
C. Construction of all three buildings is considered as one project
D. Construction of each building is a project because each building is unique in nature