Which of the following statements about business rules is FALSE?下面哪一项对于业务规则的描述是错误的?:()?
（A）Data rules constrain how data relates to other data.数据规则，约束了数据之间如何关联
（B）All business rules must be identified prior to the start of the data modelling process.所有业务规则都必须要在数据建模工作开始前预计定义好
（C）Data rules cannot be shown on a data model.数据规则，并且不能用数据模型进行表示
（D）Action rules are difficult to define in a data model.行为规则很难定义在数据模型中
（E）Action rules are instructions on what to do when data elements contain certain values.行为规则说明了当数据元数包含确定的数据值的时候该如何做 答案解析: 首先看看下面截图，什么是业务规则，: 从表中可知:(1)代表某个业务在数据技术上的表示以及相关的约束定义(2)业务规则与模型无关 所以答案是“Data rules cannot be shown on a data model.”
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