How can you find all of the contacts who don’t have a value in a particular property?

1. Add a filter for that property and set it to “Is Unknown.”
2. Add a filter for that property and leave it blank.
3. Don’t add a filter for that property.
4. Add a filter for that property and enter “NULL” (in all capitals).

Correct Answer:

• Add a filter for that property and set it to “Is Unknown.”