Answer:
Driving at unsafe speeds
Explanation:
Between the years 2009 and 2013, the primary factor that caused collisions in California was driving at unsafe speeds. The number of accidents reported was at peak due to a majority of the drivers over-speeding.
The initial effects of the atomic bomb dropped on Hiroshima and Nagasaki were: the entire city was razed to the ground and nothing left standing.
The answer to your question would be letter B. The other letter choices are incorrect.
