Use logarithmic differentiation to find dy/dx for the function y = (x + 1)(x - 3)(x - 1)(x + 3), where x > 3. Which of the following options correctly describes the first step in the process? A) Differentiate each term of the function. B) Take the natural logarithm of both sides. C) Apply the product rule. D) Simplify the function before differentiating.