How to reduce your utility bills<br>Make sure that you turn the lights off whenever you leave the room. If there is no one in the room, there is no point in lighting it up and all you are really doing is wasting both electricity and money. You can buy timers if you are worried about burglars and other things but make sure that you do not leave unnecessary lights on.
Can we infer the following?
The best reason to leave lights on if there is no one in the room.

Options:
[a]. Yes
[b]. It's impossible to say
[c]. No
The answer is:
[c].