I do believe that, after research, it is C, Coltan.
Correct me if I am wrong, but do have a good day!
Here is the answer "<span>William Howard </span>Taft<span> in </span>Progressive<span> Era Politics. William Howard </span>Taft<span> (1857-1930) was the 27th </span>president<span> of the United States and Theodore Roosevelt's hand-picked successor. ... His administration nonetheless pursued more antitrust suits than Roosevelt."</span>
The black death occurred during the 1340's