Assume a user is presented with a JOptionPane dialog with that prompts the user for a Yes, No response. How can the programmer detect if the user has clicked the "x" button to close the dialog box instead of a "Yes" or "No" button? O a. The dialog box call returns null O b. The dialog box call will throw an exception O c. The dialog box call returns a value of -1 O d. The program returns the value JOptionPane.X_Option O e. The dialog box call does not return but instead exits the program