A. It encouraged expansion by granting low-cost land to settlers
Where there any choices? This is true for a lot of countries: Basically all European countries with the exception of those that never fell to the Nazis :UK, Switzerland, Sweden, Spain, Portugal.
Answer:
from what I understand it should be (b) seems more like it's to protect the statement
They're not coming to take over our home land they're just looking for new opportunities that their homeland did not provide
