Fill in the code below in the underline:

```
public class Test {
public static void main(String[] args) {
Test test = new Test();
System.out.println(test.setAction3(_____________));
}

public double setAction3(T3 t) {
return t.m(5.5);
}
}

interface T3 {
public double m(Double d);
}
```
a. () -> e * 2
b. (e) -> e * 2
c. e -> e * 2
d. (e) -> {e * 2;}

b. (e) -> e * 2
c. e -> e * 2