Why did the impact of King George's War on the middle colonies differ from the war's impact on the ...

Why did the impact of King George's War on the middle colonies differ from the war's impact on the New England colonies?
 
  a. Fertile soil allowed the middle colonies to lead the way in the foodstuffs trade during and after the war.
  b. The shipbuilding industry put the middle colonies in a favorable economic position during and after the war.
  c. The variety of ethnic groups in the middle colonies caused political, social, and economic instability during andafter the war.
 d. Because of heavy casualties during the war, the middle colonies experienced severe labor shortages andeconomic stagnation in the war's aftermath.