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建设项目风险产生主要是由于建设项目的各种不确定性事件造成的，而建设项目的不确定事件又是由于建设项目信息的不完备造成的。造成建设项目风险的原因主要包括（）。
A
人们的认识能力有限
B
信息本身的滞后性特性
C
建设项目事务的发展变化
D
建设项目信息资源管理和沟通管理的原因
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