During a risk assessment of a financial institution, a risk practitioner discovers that tellers can initiate and approve transactions of significant value. This team is also responsible for ensuring transactions are recorded and balances are reconciled by the end of the day. Which of the following is the risk practitioner's BEST recommendation to mitigate the associated risk? • Implement separation of duties. • Require a code of ethics. • Implement continuous monitoring. • Require a second level of approval