You should fill in the blank in the following code with ______________.public class Test {public static void main(String[] args) {System.out.print("The grade is ");printGrade(78.5);System.out.print("The grade is ");printGrade(59.5);}public static __________ printGrade(double score) {if (score >= 90.0) {System.out.println('A');}else if (score >= 80.0) {System.out.println('B');}else if (score >= 70.0) {System.out.println('C');}else if (score >= 60.0) {System.out.println('D');}else {System.out.println('F');}}}A. int. B. double.C. boolean.D. char.E. void.