看了一下說明，我給父母同時申請綠卡，似乎可以填I864EZ表，instead of I864表. But I've got one question: Part 1 C: ;
The sponsored immigrant is the only person immigrating based on the underlying visa petition Should I answer Yes? My parents are currently in the US on B2 visa. What does the underlying visa refer to here? Thank you!
