Describe how the sankin-kotai system affected the Daimyo.

The costs of the sankin kotai was the financial drain it placed on the daimyo, an economic and political cost of keeping the daimyo weak in relation to the shogun. ... Yet this cost allowed the Tokugawa to maintain its hegemony over Japan until 1862.

c) troops march forward in close formation against newer, more accurate weapons

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.