Final answer:
In ServiceNow, a column in a list represents a field in a record. Each column corresponds to a separate field in the table, reflecting different pieces of information such as names or IDs.
Step-by-step explanation:
In the context of a ServiceNow instance, a column in a list corresponds to A) a field in a record. When you view a list of records, such as a list of incidents or users, each column displays data from a particular field in the underlying table. For example, if you have a list of employee records, a column could represent the employee's name, another the employee ID, and so on, with each one reflecting a separate field where data is stored in the ServiceNow database.