Which of the Following Is an Example of an Offensive

Which of the following is an example of an offensive rationale for government intervention?

A) The government of Erbia imposes trade restrictions on the export of plutonium to certain countries.
B) The government of Berylia imposes a trade barrier to curtail the import of low-priced products from manufacturers in the developed economies.
C) The government of Argonia imposes investment barriers to safeguard special interest groups.
D) The government of Rhodia requires foreign companies to enter its huge markets through joint ventures with local firms.