The 2011 earthquake and tsunami in Japan killed approximately 21,000 people while the 2010 ...

The 2011 earthquake and tsunami in Japan killed approximately 21,000 people while the 2010 earthquake in Haiti killed approximately 316,000 people because ________.
 
  A) the earthquake in Haiti was a larger magnitude (released more energy) than the one in Japan
  B) the population of Haiti was much greater than that of northern Japan where the earthquake occurred
  C) the earthquake in Haiti generated a very large tsunami that killed most of the people
  D) the construction methods in Haiti were not as good as those used in Japan
  E) All of the above were factors.