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

#include <iostream>
#include <string>
using namespace std;
int main ()
{
  string str ("helloworld.");
  cout << str.substr(3).substr(4) << endl;
  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