The Following Questions Refer to the Excerpt Below

The following questions refer to the excerpt below.
"The conventional wisdom on the origins of the Immigration Reform Act of 1965 suggests that it was primarily a product of the civil rights movement… However,ideational effects of the cold war also played a part in the political developments of 1965… Cold war foreign-policy considerations pressed for increased openness for ethnic minority immigration to reduce tensions with allied (or potential allied) countries,and conversely,civil rights leaders were able to gain leverage for the Civil Rights Act by exploiting this tension and forcing Americans to practice the liberalism reflected in their founding myths."
Christopher Rudolph,National Security and Immigration: Policy Development in the United States and Western Europe Since 1945,2006
-The most significant result of the policy change described in the passage was that

A) significant numbers of international migrants sought opportunities in the United States.
B) fears of Communist influences led to general hostility towards immigrants.
C) the civil rights movement experienced a philosophical divide over the inclusion of immigrants.
D) America's role as an international peacekeeper declined significantly.