Long term ethnic conflict in Ethiopia has been motivated by A.
debate surrounding Egyptian access to the sources of the Nile River.

B.
war with South Sudan.

C.
growth of terrorist cells in Somalia and Kenya.

D.
questions of state sovereignty.

E.
civil war with Eritrea.

It is c) binge drinking alcohol 

After spending all that time on the research then by all means modify the hypothesis or aim by reporting such. for example the findings did not bring forth what was expected but brought about different yet interesting findings worth exploring so the hypothesis is changed to reflect this new findings.

i may be way off but.