Why Have United States Loggers Protested British Columbia Timber Operations

Why have United States loggers protested British Columbia timber operations?

A) The quality of British Columbian lumber is far superior to that of U.S. lumber.
B) The British Columbia provincial government has granted these operations special privileges which gives them a competitive advantage.
C) British Columbian loggers are willing to work for far lower wages.
D) British Columbia's coastal location makes it far more inexpensive for logging operations there to ship their lumber abroad.
E) All of the answer choices are correct.