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Which one of the expressions below is the simplest form of
#frac{6(p+3r)+p}{4(2r+p)-r}#

A.#frac{7p+3r}{p+7r}#

B.#frac{4p+qr}{3r+2p}#

C.#frac{12p+18r}{4r+4p}#

D.#frac{7p+18r}{4p+7r}#