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Which one of the following expressions is the simplest form of
`frac{4(tq+t)+2(3q-2tq)}{2(t+q)+2q}`
A. `frac{2t+3q}{t+2q}`
B.`frac{2tq+4t+3q}{t+3q}`
C.`frac{2tq+t+6q}{2t+3q}`
D.`frac{2t+3q}{t+3q}`