Which two reasons could be the cause?

The administrator of Universal Containers is testing an approval process in a recently refreshed Developer Pro sandbox and is finding that none of the notification emails are being sent to the approvers.

Which two reasons could be the cause? Choose 2 Answers
A . Workflow emails only work in Full sandboxes.
B . The email addresses for the users are incorrect.
C . HTML templates are not available in sandboxes.
D . The Deliverability Access Level setting is incorrect.

Answer: B,D