c^2-4/6c^4+15c^3 รท c^2+4c+4/12c^3+30c^2?

A: c(c-2)/2(c+2)

B: 2(c-2)/c(c+2)

C: c(c+2)/2(c-2)

D: 2(c+2)/c(c-2)

The answer is C

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