We can output text to an object of class ofstream using the insertion operator « because

the ofstream class is a stream
the insertion operator works with all classes
we are actually outputting to cout
the insertion operator is overloaded in ofstream

The correct answer is: D. the insertion operator is overloaded in ofstream.

The insertion operator << is overloaded in the ofstream class to allow it to be used to output text to an object of that class. This is done by defining a member function called operator<<() that takes a string as its argument and outputs the string to the file stream.

The other options are incorrect because:

  • The ofstream class is a stream, but this is not the reason why we can output text to an object of that class using the insertion operator <<.
  • The insertion operator works with all classes, but this is not the reason why we can output text to an object of the ofstream class using the insertion operator <<.
  • We are not actually outputting to cout when we output text to an object of the ofstream class using the insertion operator <<.