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Which of the following expressions shows...

Which of the following expressions shows that rational numbers are associative under multiplication

A

`(2)/(3) xx ((-6)/(7) xx (3)/(5)) = ((2)/(3) xx (-6)/(7))xx(3)/(5)`

B

`(2)/(3) xx ((-6)/(7) xx (3)/(5)) = (2)/(3) xx ((3)/(5) xx (-6)/(7))`

C

`(2)/(3) xx ((-6)/(7) xx (3)/(5)) =((3)/(5) xx (2)/(3) ) xx (-6)/(7)`

D

`((2)/(3) xx (-6)/(7)) xx (3)/(5) = ((-6)/(7)xx(2)/(3))xx(3)/(5)`

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