The proper answer to this question is option D "to persuade" .
Reason:
Political speeches are more likely campaigns with two or more sides and they make the speeches so they can persuade to get more followers on their side to vote for him or her!
There are three general purposes<span> that all political </span>speeches<span> fall into to </span>inform<span>, to </span>persuade<span>, and to </span>entertain<span>.</span>