题目：在以下递归方法中，哪个参数在每次递归调用时都会改变其值？
A. public static void factorial(int n) { if (n == 0) return; System.out.println(n * factorial(n - 1)); }
B. public static int factorial(int n) { if (n == 0) return 1; return n * factorial(n - 1); }
C. public static void factorial(int n) { if (n == 0) return; System.out.println(n / factorial(n + 1)); }
D. public static int factorial(int n) { if (n == 0) return 1; return n / factorial(n - 1); }
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