Final answer:
The deli clerk should wash hands and change gloves before preparing a sandwich.
Step-by-step explanation:
The deli clerk should wash hands and change gloves before preparing a sandwich for a customer.
Regular handwashing is important to prevent the spread of foodborne diseases and ensure food safety. Washing hands before and after handling or preparing food is especially crucial to avoid contamination. Additionally, changing gloves helps maintain cleanliness and minimize the risk of cross-contamination.
By following proper hand hygiene practices, the deli clerk can ensure a safe and hygienic food preparation process for the customers.