Which of the following security measures should a cashier follow to prevent theft?

Being aware of suspicious behavior is crucial for preventing theft in a cashier setting. This proactive measure helps cashiers identify potential theft risks and take appropriate action before a crime occurs. For instance, recognizing individuals who are behaving unusually or trying to distract the cashier can enable the cashier to maintain vigilance and safeguard the cash and merchandise.

This awareness also fosters an environment of security, as it supports the idea that cashiers are attentive and trained to spot potential issues. By staying alert to the actions of customers and other individuals in the vicinity, cashiers can report suspicious activity to management or security, further enhancing the security of the establishment.

Other options, such as leaving the cash drawer open, ignoring large bills, or sharing cash drawer access, do not contribute to theft prevention. Instead, they create opportunities for theft to occur, demonstrating the importance of vigilance and awareness.