Xiao Zeng opened an account in a bank and performed online banking, but shortly afterwards, Xiao Zeng found that 30,000 yuan in his account was transferred through online operations without his knowledge, and the account The password is only known to him and never leaked to others. Xiao Zeng finds the bank and asks the bank to take responsibility. The bank is very sure that the responsibility cannot be with himself and must be with Xiao Zeng. Although Xiao Zeng did not intentionally leak the password, it is possible Unintentionally. Among the following items, the most supportive of the bank's views are:. ['Xiao Zeng is particularly good to his wife, but his wife has a dislike for Xiao Zeng.', 'Xiao Zeng likes drinking, and is often drunk and unconscious.', "the bank's online banking system is impeccable.", 'the bank has never had a similar incident before.']