How did pan-slavism increase the sphere of the war?

it supported the union of the ottoman empire and russia.

its goal was to protect slavic people from russian rule.

it urged all slavic states to unite under the ottoman empire.

it sought to unify people of slavic ancestry in many countries.

It sought to unify people of Slavic ancestry in many countries

Explanation:

The Pan-Slavism had few basic goals. The basic goals of it were to unite the people of Slavic ancestry, to create one very large and strong Slavic nation, and the people of Slavic ancestry to stick together and support each other.

This ideas though never came to be, with the main reasons being the numerous conflicts between the Slavic nations, as well as lot of tensions and ''bad blood'' between them. These ideas still exist today but the majority of the Slavic people do not want such a thing, so it is only very tiny percentage of people that stand for it.

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.

mass production/ assembly line production