Egypt remained stable through many dynastic changes a. it was geographically isolated b. egyptians invented the chariot c. of their monotheistic religion d. the government signed peace treaties with other empires

The answer is D because geography has little to do with it same with chariots people don't just walk up to a civilization and say "READY ATTAC- WAIT WAIT dang guys they have chariots no invasions today i guess" and having a single god as a religion does not create total peace (cough the crusades) so really D is the only logical answer