A two-variable data table returns ________ result(s) for each combination of two variables

The operand ________ yields true if and only if both of its operands are true.

A. XOR B. OR C. AND D. NOT

Show the output of the following program:

``` include using namespace std; void f(int n) { if (n > 0) { cout << n << " "; f(n - 1); } } int main() { f(5); return 0; } ```