In the eighth century, Pope Gregory III designated November 1 as a time to honor all saints. Soon, All Saints Day incorporated some of the traditions of Samhain. The evening before was known as All Hallows Eve, and later Halloween. Hope that helps
A is the correct answer.
Dead Zones, especially in the Gulf of Mexico, are caused primarily by phosphorous and nitrogen loading from farms in the Midwest that run down rivers and down the Mississippi and into the Gulf of Mexico where they choke out life.