Which of the following is biggest factor that makes Computer Crimes possible? 以下哪一个因素最可能导致计算机犯罪？（）

• A、Victim carelessness. 受害者的错心大意
• B、Collusion with others in information processing. 与他人勾结处理信息
• C、System design flaws. 系统设计的缺陷
• D、The fraudster obtaining advanced training & special knowledge. 受过高级培训或掌握特殊技能的诈骗者