Evidence for mother when birth certificate is not available

[theendcomesquick 4]

Hello all, wondering if anyone has experience with a similar issue.

 

I am a USC petitioning for my mother from Yemen, a country which does not have reliable birth certificates. So we have received a RFE for more evidence such as affidavits of birth, school/church records, photos from childhood etc. Other option is to submit a DNA test.

 

Pictures from childhood are not available; the most recent pictures of petitioner and beneficiary together are from about 2010. School records or religious records are not available. The petitioner has a marriage certificate from 2010 with the mother's name on it as the mother of the groom. We already did affidavits of birth from 2 family members but it was apparently not enough since they asked for more evidence.

 

So my question is what are the chances that existing photos and marriage certificate (which is fairly recent) be enough to approve the case? Or should we rather opt for the genetic testing instead?