I believe the answer is primary.
Describing the problem is the first step in the basic structure
of a persuasive speech.
The Untouchables were<span> a group of nine U.S. federal law-enforcement agents led by Eliot Ness, who, from 1929 to 1931, worked to end Al Capone's illegal activities by aggressively enforcing Prohibition laws against Capone and his organization.</span>
The answer is D, Oklahoma