Find the sum of the three expressions and choose the correct answer. -2u3v + 5uv - 1 7u3v - 2u2v2 5u2v2 - uv + 6 A)5 u^3v + 3 u^2v^2 + 4 uv + 5 B)5 u^3v - 3 u^2v^2 + 4 uv - 5 C)-5 u^3v - 3 u^2v^2 + 4 uv + 7