How Does the United States Treat Economic Migrants and Refugees

How does the United States treat economic migrants and refugees differently?

A) Refugees must first obtain visas and economic migrants need green cards.
B) Refugees must prove they will receive remittances.
C) Economic migrants are not admitted if they already have close family in the U.S.
D) Economic migrants are typically admitted because they possess special skills.
E) Refugees have priority over economic migrants for new jobs.