[单选题]
Consider a closed pipt/o1p xsvx4u7s :7zw fq3cwf .e ofne p u+h;vgm bnql41h( 12ix:iiz 9u5s length L. What are the wavelengths of the three lowest tones produced b+2hqszi ;5u (x4ihlin9 evunp 1mg:b1 y this pipe?
A. 4L, 2L, L
B. 2L, L, L/2
C. 2L, L, 2L/3
D. 4L, 4L/3, 4L/5
