Which factors were the greatest challenges facing the american economy in the years following world war i? a) trade embargoes and tariffs from germany, italy, and japan b) a shortage of steel, rubber and oil and a shortage of labor c) dust bowl conditions in the midwest and paying back loans to great britain d) returning over 4,000,000 soldiers to the workforce and filling the void left by the cancellation of wartime manufacturing contracts

D) Returning over 4,000,000 soldiers to the workforce and filling the void left by the cancellation of wartime manufacturing contracts.

Explanation:

answer; the period of time known as the middle ages;

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.