Which Statement Allows You to Properly Check the Char Variable

Which statement allows you to properly check the char variable code to determine whether it is equal to a C and then output This is a check?

A) if code is equal to C
cout << "This is a check\n";
B) if (code = "C")
cout << "This is a check\n";
C) if (code == 'C')
cout << "This is a check\n";
D) if (code == C)
cout << "This is a check" << endl;