What will be the output of the following C++ code?

#include <iostream>
#include <complex>
using namespace std;
int main() 
{
   complex<double> c1(4.0, 16.0), c2;
   c2 = pow(c1, 2.0);
   cout << c2;
   return 0;          
}

A. A collection of functions B. A reserved keyword in C++ C. A blueprint for creating objects D. A way to declare arrays of data

A. new B. create C. object D. None of the above

A. A reserved keyword in C++ B. An instance of a class C. A way to declare arrays of data D. None of the above

A. To hide the implementation details of a class B. To create multiple instances of a class C. To initialize the object's data members D. To destroy the object