Which statement accurately describes how Congress and the Supreme Court influence U.S. immigration policy?

A. The Supreme Court proposes new immigration regulations, which Congress must approve.
B. Congress regulates who is allowed to immigrate, while the Supreme Court decides how many immigrants should be allowed each year.
C. Congress passes laws to regulate immigration, while the Supreme Court determines whether the regulations are constitutional.
D. The Supreme Court regulates who is allowed to immigrate, while Congress decides how many immigrants should be allowed each year.