Which of the Following Is True of Government Interventions in a Country's

Which of the following is true of government interventions in a country's trade practices?

A) A major economic motive behind government intervention in trade is the protection of jobs.
B) A major political motive behind government intervention in trade is the protection of infant industries.
C) Government interventions help companies take advantage of economies of scale and be the first movers in their industries.
D) Governments intervene to protect only imports,as the protection of exports is handled by private agencies.