I do believe that, after research, it is C, Coltan.
Correct me if I am wrong, but do have a good day!
Generally speaking, after being an apprentice, a person would become a "journeyman," since this required a higher set of skills and expertise. This was not always the case, however.
Arab nations of the Organization of Petroleum Exporting Countries (OPEC) imposed an embargo against the United States and its allies as a response to the U.S. decision to provide military support to the Israeli in order to give the Israel a jump start in the post-war peace negotiations.
