Which of the Following Is True of the Act-Of-State Doctrine

Which of the following is true of the act-of-state doctrine?

A) State-regulated models discourage price-fixing and collaboration among competitors.
B) When the illegal conduct is that of a foreign government, the courts are permitted to examine and decide the merits of any claim alleged.
C) It forbids courts of the United States from evaluating the lawfulness of acts of foreign sovereigns performed within their own territories.
D) It forbids the merger of foreign companies that have significant sales in the United States.