Which action directly caused the united states to enter world war i

a. germany are food safety to pancho villa
b. germany used airplanes to attack american naval ships
c. germany’s sink ships caring american passengers
d. germany attacked france
need fast
15

the cell goes through mitosis

explanation:

according to the map, most industrialization in europe occurred in the northwest.

the production of coal and lignite deposits was profitable throughout western europe.

the building of railroads transport goods throughout europe.

according to the map, the population trend indicates that more people are moving into cities.

northwest

coal and lignite depostis

railroads

cities