Read the quote by Theodore Roosevelt. What were the conditions under which the canal laborers lived and
worked? Check all that apply.
O sniper attacks
O malaria and yellow fever
O drought
O heat and humidity
O mudslides

heat and humidity

mudslides

malaria and yellow fever

Explanation:

all of the

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.