var correctAnswers = new Array(15);
correctAnswers[1] = "d";
correctAnswers[2] = "d";
correctAnswers[3] = "a";
correctAnswers[4] = "b";
correctAnswers[5] = "d";
correctAnswers[6] = "b";
correctAnswers[7] = "b";
correctAnswers[8] = "c";
correctAnswers[9] = "d";
correctAnswers[10] = "b";
correctAnswers[11] = "b";
correctAnswers[12] = "a";
correctAnswers[13] = "d";
correctAnswers[14] = "b";
correctAnswers[15] = "d";