[单选题]
Consider an open pipe k 2p /:ykiazb2h8q6bbof e4z+mhsz8e,/amiw ild. ,d ;r+/d lgulength L. What are the wavelengths of the three lowest tones produced b+zw, +zgdr m; hiud /.e,l/ad8s4imel y this pipe?
A. 4L, 2L, L
B. 2L, L, L/2
C. 2L, L, 2L/3
D. 4L, 4L/3, 4L/5
