Which of the following was not a subject taught in ancient Athenian schools? A. music
B. debate and oration
C. theology
D. arithmetic

C. Theology is the only one no taught back then

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.

d is the best answer for this question.