For each of the following cash activities, choose the appropriate letter to match the activity with the internal control principle to which it relates. Each internal control principle may be used more than once. Activity Internal Control Principle A password is required to open up the cash register. A Establish responsibility The treasurer is the person who is approved to sign cheoks. B. Segregate duties A list of checks received in the mail is prepared. C. Restrict access A bank reconciliation is prepared each month. D. Document procedures The treasurer is not permitted to make bank deposits. E. Independently verify Checks are pre-numbered. Cashiers cannot approve price changes. Unused checks are kept in the vault