Answer:
it is not the 3 or 4, so I think its 1 or 4
Https://quizlet.com/35691838/unit-5-essay-c-flash-cards/ (found this on quizlet hope this makes sense and/or helps!)
Prohibit the massive immigration of mainly intellectuals into more prosperous west Berlin, thereby safeguarding the power and control of the east German government and the community bloc there.
