Simplify the expression. Assume that all variables are positive.y1/3(y4/9 - 7y2/9)

A. y3/4 - 7y3/2
B. y4/27 - 7y2/27
C. y7/9 - 7y5/9
D. y-1/9 - 7y1/9

Answer: C

Mathematics

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