What Was the Research Finding of an Israeli Study of Immigrants

What was the research finding of an Israeli study of immigrants from Ethiopia and Eastern European countries regarding grandparents and their grandchildren?

A) Few children lived with their grandparents.
B) Grandparents had little control over their grandchildren.
C) Grandparents had a strong influence over grandchildren who were living in single-parent homes.
D) Whether children lived a single-parent or two-parent family household had no effect on the role of the grandparents.