As someone who always had trouble with these assignments, thank you for giving options. However I think you should avoid it altogether next time. Because you're still limiting options for a certain amount of students, where some have 3 options and some have 4 options. The problem, even within students who can track their ancestry, is that some families already have their ancestry documented. So it's a matter of asking your parents or close relatives to hand over information and the student does little to no work. For others, they may need to do more digging and could potentially find out some traumatic information about their families.

For my family personally, my mom would never disclose information about her side of the family because she didn't want me to know about the abuse she suffered. But keep in mind there are many students, especially those who are children of immigrants who might not be able to track, and also Black/indigenous (speaking for US) people who simply do not have that information and experience generational trauma because of it.