What impact does a field marked as Nullable have when importing a file into a data extension?

What impact does a field marked as Nullable have when importing a file into a data extension?
A . The field is NOT required in the file being imported.
B . The field is required but can have blank values.
C The field only accepts true or false values.

Answer: A

Explanation:

When a field in a data extension is marked as Nullable, it means that the field is not required to have a value; it can accept null or empty values. During the import process, if a field is marked as Nullable, it indicates that the corresponding column in the file being imported does not necessarily need to contain data for every record. This allows for greater flexibility in the data import process, as not all data fields may be relevant or available for every record being imported into the data extension.