
Passage: A company has a six-story office building. The company's finance department, planning department, administration department, sales department, human resources department, R & D department and other six departments work here, each department occupies one floor. It is known that: (1) the floors of the human resources department and the sales department are not adjacent; (2) the finance department is on the lower floor of the planning department; (3) the floor of the administration department is above the planning department, but below the human resources department.
Question: If the finance department is on the third floor, which of the following may be true?
A. A.The R & D department is on the fifth floor
B. B.The R & D department is on the upper floor of the sales department
C. C.The administration department is not on the upper level of the planning department
D. D.The sales department is on the upper floor of the planning department
Answer: