Who dominated Mexican political life in the 19th century?

Porfirio Díaz

Explanation:

After another revolt–this time successful–against Júarez's successor Sebastián Lerdo de Tejada, Porfirio Díaz takes control of Mexico. Except for one four-year stretch from 1880 to 1884, Díaz will rule essentially as a dictator until 1911.

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.