Final answer:
The cutting board used for chopping raw chickens should be cleaned and sanitized after each use.
Step-by-step explanation:
When using a cutting board for chopping raw chickens, it is important to clean and sanitize it properly to prevent the spread of harmful bacteria. The correct answer is 1) After each use. After each use, wash the cutting board with hot, soapy water, and then sanitize it using a bleach solution or a food-safe sanitizing spray. This will help ensure that any bacteria from the raw chicken is effectively eliminated.