1. In a single function declaration, what is the maximum number of statements that may be recursive calls? o A. 1 o B. 2 o C. n (where n is the argument) o D. There is no fixed maximum 2. What is the maximum depth of recursive calls a function may make? o A. 1 o B. 2 o C. n (where n is the argument) o D. There is no fixed maximum 3. Consider the following function void super write vertical(int number) // Postcondition: The digits of the number have been written, // stacked vertically. If number is negative, then a negative // sign appears on top // Library facilities used: iostream.h, math.h if (number = 0 && number 10