[单选题]
Consider a closed pipe of length L. What are the wav7r4 bf8. qdb c1lqerj5elengths of the three lowzs9 ezv5op84e e4vuhq: l g(3best tones q v94l bszee3 8evoz:u(5h4 pgproduced by this pipe?
A. 4L, 2L, L
B. 2L, L, L/2
C. 2L, L, 2L/3
D. 4L, 4L/3, 4L/5
