Europeans settled the North American continent gradually. First, colonists created settlements along the East Coast. Once these were well established, people began to move to the Midwest in search of open space and land for farming. With the gold rush, followed by severe droughts in the middle of the country, more and more settlers began pushing all the way to the West Coast, where frontier outposts turned into thriving cities. Finally, Alaska and Hawaii were added to the United States in 1959.Which excerpt from the text best shows that the passage uses a sequential pattern?
A.frontier outposts turned into thriving cities
B.First, colonists created settlements along the East Coast.
C.Europeans settled the North American continent gradually.
D.severe droughts in the middle of the country