Consider the main body of a C++ program. If the program is run, what will be displayed on the screen?

string var1 = “Computer “;
string var2 = “Science”;
string var3 = var1 + var2;
cout << var3 << endl;
If the program is run, what will be displayed on the screen?
(A) var3
(B) Computer
(C) Science
(D) Computer Science

The answer is: (D) Computer Science