What could be reasons why the additional new contacts are not showing?

You have 1500 contacts and have manually uploaded 100 additional new contacts, but the number of available (opted-in) new contacts on the Database Growth widget still shows 1500 contacts.

You checked that the email address fields are filled and the email addresses are valid.

What could be reasons why the additional new contacts are not showing? Note: There are 2 correct Answer to this question.
A . The opt-in field was not set to TRUE.
B. The Database Growth widget only shows auto-imported contacts.
C. The update takes at least 24 hours to show in the widget.
D. Too many new contacts were uploaded at the same time.

Answer: A,C