To determine the LCD of the fractions, factor the denominators. Multiply the factors obtained; however multiply only once the common factors.
For the numerical coefficients: 5 , 19, and 2, the least common multiple is 190. For the variables involving x: x^4 , x, and x, the least common multiple is x^4. That of the variables involving y: y, y² and y is y². Thus, the answer is letter C.