In this Java snippet that checks how many doors are in the room that you are in, which conditional statement is missing for line 5 ?
1 scanner input = new scanner (system. in);
2 int num0fDoors = input.nextInt();
3 if(_____==0_{
4 system.out.println('You must be outside.');
5 }______{
6 system.out.println(_________);
7 }

a. for
b. if for
c. else if
d. else