Its a total SCAM. First, its illegal to ask for your citizenship or date of birth AND PLEASE do not give out your Social Security number. In fact, when I called back, the first thing they asked if if I had a high school diploma or GED. I answered "no" and the robo hung up.
You can tell this is a scam/robo when you answer and there is a longer than normal delay as well as when you answer questions, it seems as if you are on a telephone support triage (like the ones cable and utilities companies have), just not as pleasant sounding.
These calls are unsolicited calls and sound convincing but are a scam.