If p:q = 3:4 and q:r = 8:9, then p:q:r =_____?

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If p:q = 3:4 and q:r = 8:9, then p:q:r =_____?
(A) 8:6:9
(B) 9:8:6
(C) 6:8:9
(D) 3:32:8
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