问题：
[单选题]一个事务的执行,要么全部完成,要么全部不做,一个事务中对数据库的所有操作都是一个不可分割的操作序列的属性是( ) 。
A、原子性
B、一致性
C、独立性
D、持久性
参考答案：
A
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