Which of the following is the MOST likely cause of a non-malicious data breach when the source of the data breach was an un-marked file cabinet containing sensitive documents?

Which of the following is the MOST likely cause of a non-malicious data breach when the source of
the data breach was an un-marked file cabinet containing sensitive documents?

A.
Ineffective data classification

B.
Lack of data access controls

C.
Ineffective identity management controls

D.
Lack of Data Loss Prevention (DLP) tools