What led to new problems in the years after world war 1

could you give me the options ?

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

. to apply pressure and persuasion to keep party members in the chamber in line.