<p>Is anyone 100% Sure on what the answer to this is?</p>
<p>The United States:</p>
<p>A. had a two-party system until 1890.
B. had a one-party system until 1860.
C. has always had two parties, the Democrats and the Republicans.
D. had a three-party system for most of the 1800s.
E. has primarily had a two-party system for the last 200 years. </p>
<p>I think it's "D"... But I'm not sure.</p>