Which of the following most logically completes the argument?
The city is threatened by an impending tropical storm, which is expected to raise the water outside the city to levels approaching the height of the protective barrier along the coast. Three teams of engineers and oceanographers have independently predicted the maximum water level will reach 89%, 83%, and 88% of the height of the protective barrier. The city is sufficiently safe, provided that _______________.
【选项】
the three teams of engineers and oceanographers have based their predictions on dissimilar assumptions
选项是否正确？