Which of the following is a common tactic used by minors to acquire alcohol?

Using different store entrances is a tactic often employed by minors attempting to acquire alcohol. This strategy can help them avoid recognition by store employees or security personnel who may be aware of their previously unsuccessful attempts to purchase alcohol. By entering through various doors, minors aim to present themselves as new customers, thereby increasing their chances of successfully buying alcohol without attracting attention. This behavior reflects a level of planning and understanding of the retail environment, demonstrating how minors may strategize to bypass age verification processes.

The other options, while they may seem plausible in different contexts, do not specifically relate to common methods that minors might typically use when attempting to obtain alcohol. For instance, displaying a fake smile may not significantly impact an employee's decision to sell alcohol if they are vigilant about checking IDs. Buying alcohol in bulk usually requires a greater degree of scrutiny and might raise suspicion, making it less feasible for minors. Requesting a receipt does not inherently facilitate acquiring alcohol and is more of an administrative action rather than a tactic for evading detection. Understanding these tactics is crucial for alcohol servers and retailers in effectively managing responsible alcohol sales.