2. Westward expansion (from Unit 2) opened up an opportunity for rich natural resources. Which political party promotes economic growth by
using subsidies? How did railroads effect the Indian population?

porter is writing economic history because he is focusing on the cost of developing vaccines.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.