What Is the Difference Between Transnational and Yo-Yo Migrants

What is the difference between transnational and yo-yo migrants?

A) Yo-yo migrants travel back and forth between destination and origin countries, whereas transnational migrants simply participate in social and political activities across those same borders and do not actively relocate.
B) Yo-yo migrants leave the country they migrated to and relocate to their country of origin, whereas transnational migrants move back and forth between the two countries.
C) Yo-yo migrants move between two countries to develop skills such as language, education, or social networks, whereas transnational migrants do the same without actually moving.
D) Yo-yo migrants move constantly within the borders of their home country, whereas transnational migrants actually move from one country to the other.