The best way to prepare for an earthquake is by correcting the structural weakness in the buildings. Thus, option D is the correct answer.
What are earthquakes?
When tectonic plates of the earth move and colides with each other, this generates friction and energy release with seismic waves, which causes earth to shake and results in earthquakes.
To make the buildings resistant to Earthquake, it is important to use a better quality raw material in the construction and the foundation of the building should be correctly structured against possibilities of an earthquake by engineers.
Therefore, option D correcting structural weakness will help to prepare for the earthquake is appropriate.
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