The influence of the Byzantine empire change the kievan state by coverting to christian, adopted the cyrillic alphabet and cutting off from trade routes.
Answer: B, C & E
Step-by-step explanation:
The byzantine empire had a great impact on the kievan state and made influential changes on that empire like the religion of Christianity became a very important religion of those empire and it also led to the adoption of the Cyrillic alphabet by the kievan state.
The kievan state also had to face certain economic losses because the routes with which it used to trade on was cut off because of decline in Constantinople.