Which sentence is grammatically correct and expresses a hypothetical past situation related to a natural disaster?
A) If the warning system worked, fewer people would be affected by the tsunami.
B) If the warning system had worked, fewer people would have been affected by the tsunami.
C) If the warning system works, fewer people will be affected by the tsunami.
D) If the warning system has worked, fewer people would be affected by the tsunami.
E) If the warning system would work, fewer people had been affected by the tsunami.
