<p>This is a <span style="color:#8e44ad;"><strong>Function Question</strong></span> since the question is asking which part of the passage fulfills a specific purpose to "reinforce a criticism of responses such as Isaac's to *Raisin in the Sun*". We are looking specifically for a point that enforces the idea that the critics are wrong to think the "thematic conflicts" in Hansberry's plays are "contradictory" or bad in general. Furthermore, due to the word "reinforce", we know that the correct section must appear after the criticism of "Isaacs".</p>
<p><span style="color:#27ae60;"><span style="font-size:20px;">The Right Answer</span></span></p>
<p><span style="color:#27ae60;">D:</span> DuBois is mentioned as another author who has conflicting elements in their work. The passage states that despite these "conflicts", Dubois's work is "famous" and "well-considered". The author mentions this to support the point made earlier that criticism of *Raisin in the Sun* for "conflicts" is unfair.</p>
<p><span style="color:#e74c3c;"><span style="font-size:20px;">The Wrong Answers</span></span></p>
<ul>
<li><span style="color:#e74c3c;">A:</span> This point is made before Isaacs is mentioned, so it can't be "reinforcing" the criticism against him.</li>
<li><span style="color:#e74c3c;">B:</span> This point is made before Isaacs is mentioned, so it can't be "reinforcing" the criticism against him.</li>
<li><span style="color:#e74c3c;">C:</span> This point is made before Isaacs is mentioned, so it can't be "reinforcing" the criticism against him.</li>
<li><span style="color:#e74c3c;">E:</span> The fact that Fanon considers "internationalism" to be ideal does not in any way indicate that Isaacs was wrong to criticize Hansberry for thematic conflicts. If Isaacs was criticizing the play for "her ideal of human reconciliation", then this would be the correct answer, but the criticism is for the thematic conflicts.</li>
</ul>