Direction: Choose the option that best transforms the sentence into its other voice:
You must always follow the ISO colour coding system for the collection of waste.
1
The ISO colour coding system for the collection of waste must always be followed.
2
The ISO colour coding system for the collection of waste always must be followed.
3
The ISO colour coding system for the collection of waste has to be followed always.
4
The ISO colour coding system for the collection of waste always need be followed.