USFirms Facing Unreasonable or Unfair Trade Barriers to the Introduction

U.S.firms facing unreasonable or unfair trade barriers to the introduction of their products in foreign markets would find which of the following to be the most helpful:

A) The U.S. escape clause.
B) An appeal to the U.S. Congress to take statutory action against the offending country.
C) Petitioning the U.S. Trade Representative to intervene.
D) Asking for a countervailing duty to be imposed.