What would cause this error?

You are the technical support specialist for a company that utilizes Microsoft Dynamics 365. A new user calls the help desk complaining that every time they try to create a record, they are being denied the ability to the user states that some type of error is displayed as well.

What would cause this error?
A . The user cannot create records using the Outlook client
B . The user failed to populate at least one required field.
C . The user is using Dynamics 365 Business Edition father than Enterprise Edition.
D . The user cannot input more than 250 characters into a single line of text field.

Answer: B