The repeated implementation of different CRM technologies with different data structures is mostly a failure of:具有不同数据结构的不同CRM技术的重复实施，主要是以下方面的失败::()?
（A）Data warehousing数据仓库
（B）Data modelling数据建模
（C）Data architecture数据架构
（D）Data quality数据质量
（E）Data security数据安全 答案解析: ，题目说不同的CRM有不同的数据架构多次实施，其便是长期规划没有做充足:
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