Answer:
<em>ISMENE:</em>
<em>To me, Antigone, no word of friends</em>
<em>Has come, or glad or grievous, since we twain </em>
<em>Were reft of our two brethren in one day</em>
<em>By double fratricide; and since i' the night</em>
<em>Our Argive leaguers fled, no later news</em>
<em>Has reached me, to inspirit or deject.</em>
<em>. . .</em>
This is the excerpt that best fulfills the role of the prologue. In this passage, Ismene tells the reader the main conflict of the story: the fact that their two brothers are dead, and that they have killed each other. The excerpt also establishes another important conflict: the fact that the two sisters are alone to deal with their responsibilities and their grief, as no friend has come to look for them. The excerpt, therefore, provides useful background information and successfully establishes the main conflict of the story.