<p>I have two of them:</p>
<p>Bill simultaneously listened to music and (did) homework (at the same time) because he believed that music enabled (him) (to relax while) he studied. (No error)
(Answer is also B)</p>
<p>(Even when) Barbara Jordan put questions (toward) a political nominee, her elegant (diction evoked) in listeners (memories of) her eloquent political speeches. (No error)
(Answer is B)</p>