参考答案：B

解析：从句理解。根据原文“Although the Cold War with the Soviet Union and Eastern Europe was beginning，my parents and their generation felt secure and hopeful．”，译文为：虽然和苏联、东欧的冷战刚刚开始，但是我父母那辈的人感到很安全并充满了希望。本题关键是对让步状语从句的理解，题干中给出的是错误信息。