Below are descriptions of internal control problems. In the space to the left of each item, enter the code letter of the one best internal control principle that is related to the problem described. Internal Control Principles A. Establishment of responsibility B. Segregation of duties C. Physical control devices D. Documentation procedures E. Independent internal verification F. Human resource controls Below are descriptions of internal control problems. In the space to the left of each item, enter the code letter of the one best internal control principle that is related to the problem described. Internal Control Principles A. Establishment of responsibility B. Segregation of duties C. Physical control devices D. Documentation procedures E. Independent internal verification F. Human resource controls