What is the chief reason that forestland has declined in eastern China?
A. Large numbers of trees died as the result of a fungus.
B. People cut down the trees for heating and building and to create farmland.
C. Most of eastern China's timber has been exported to other countries.
D. People could not afford to heat with coal and used wood instead.

B. People cut down the trees for heating and building and to create farmland.:

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.

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.