问题：
[单选题]电子政务安全管理体系中，______涉及两个层面的问题：信息安全基本理论和核心技术的研究与开发；用信息安全产品和系统构建综合防护系统
A、技术保障体系
B、运行管理体系
C、社会服务体系
D、基础设施平台
参考答案：
A
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