When managing guest accounts, you need to create a guest account policy and set the account creation method. For the account creation method, which of the following descriptions is wrong?
A. When adding accounts individually, you can choose to create them individually.
B. If there are many users, you can choose to create them in batches.
C. If the number of users is relatively large, you can choose database synchronization.
D. In order to facilitate management and improve user experience, self-registration can be used.
