✅ The correct answer is:
Add a filter for that property and set it to “Is Unknown.”
Question:
How can you find all of the contacts who don’t have a value in a particular property?
Solution:
- Add a filter for that property and set it to “Is Unknown.”
- Add a filter for that property and leave it blank.
- Don’t add a filter for that property.
- Add a filter for that property and enter “NULL” (in all capitals).