What can be the origin of this issue?

An Einstein Analytics team reports that when they start their dataflow it runs successfully with no errors or warnings, but one of the fields does not return values when it is queried.

What can be the origin of this issue?
A . The field does not contain any data in Salesforce.
B . The user who runs the dataflow does not have access to the field.
C . The "Integration User Profile" does not have access to the field.
D . The ""Security User Profile" does not have access to the field.

Answer: A