How did the government connect the west coast with the rest of the country

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.

a case involving the laws of a single state.