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 " + getGrade(78.5));
System.out.print("\nThe grade is " + getGrade(59.5));
}
public static _________ getGrade(double score) {
if (score >= 90.0)
return 'A';
else if (score >= 80.0)
return 'B';
else if (score >= 70.0)
return 'C';
else if (score >= 60.0)
return 'D';
else
return 'F';
}
}
```
a. int
b. double
c. boolean
d. char
e. void
d. char
char should be placed here because the method returns a character.
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